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This paper addresses the open debate about the usefulness of high-frequency (HF) data in large-scale portfolio allocation. Daily covariances are estimated based on HF data of the S&P 500 universe employing a blocked realized kernel estimator. We propose forecasting covariance matrices using a multi-scale spectral decomposition where volatilities, correlation eigenvalues and eigenvectors evolve on different frequencies. In an extensive out-of-sample forecasting study, we show that the proposed approach yields less risky and more diversified portfolio allocations as prevailing methods employing daily data. These performance gains hold over longer horizons than previous studies have shown.
The direct financial impact of the financial crisis has been to deal a heavy blow to investment-based pensions; many workers lost a substantial portion of their retirement saving. The financial sector implosion produced an economic crisis for the rest of the economy via high unemployment and reduced labor earnings, which reduced household contributions to Social Security and some private pensions. Our research asks which types of individuals were most affected by these dual financial and economic shocks, and it also explores how people may react by changing their consumption, saving and investment, work and retirement, and annuitization decisions. We do so with a realistically calibrated lifecycle framework allowing for time-varying investment opportunities and countercyclical risky labor income dynamics. We show that households near retirement will reduce both short- and long-term consumption, boost work effort, and defer retirement. Younger cohorts will initially reduce their work hours, consumption, saving, and equity exposure; later in life, they will work more, retire later, consume less, invest more in stocks, save more, and reduce their demand for private annuities. Keywords: Financial Crisis , Household Finance , Cycle Portfolio Choice , Labor Supply Classification: D1, G11, G23, G35, J14, J26, J32
A generalization of the compressed string pattern match that applies to terms with variables is investigated: Given terms s and t compressed by singleton tree grammars, the task is to find an instance of s that occurs as a subterm in t. We show that this problem is in NP and that the task can be performed in time O(ncjVar(s)j), including the construction of the compressed substitution, and a representation of all occurrences. We show that the special case where s is uncompressed can be performed in polynomial time. As a nice application we show that for an equational deduction of t to t0 by an equality axiom l = r (a rewrite) a single step can be performed in polynomial time in the size of compression of t and l; r if the number of variables is fixed in l. We also show that n rewriting steps can be performed in polynomial time, if the equational axioms are compressed and assumed to be constant for the rewriting sequence. Another potential application are querying mechanisms on compressed XML-data bases.
Correctness of program transformations in extended lambda calculi with a contextual semantics is usually based on reasoning about the operational semantics which is a rewrite semantics. A successful approach to proving correctness is the combination of a context lemma with the computation of overlaps between program transformations and the reduction rules.The method is similar to the computation of critical pairs for the completion of term rewriting systems. We describe an effective unification algorithm to determine all overlaps of transformations with reduction rules for the lambda calculus LR which comprises a recursive let-expressions, constructor applications, case expressions and a seq construct for strict evaluation. The unification algorithm employs many-sorted terms, the equational theory of left-commutativity modeling multi-sets, context variables of different kinds and a mechanism for compactly representing binding chains in recursive let-expressions. As a result the algorithm computes a finite set of overlappings for the reduction rules of the calculus LR that serve as a starting point to the automatization of the analysis of program transformations.
In this paper we analyze the semantics of a higher-order functional language with concurrent threads, monadic IO and synchronizing variables as in Concurrent Haskell. To assure declarativeness of concurrent programming we extend the language by implicit, monadic, and concurrent futures. As semantic model we introduce and analyze the process calculus CHF, which represents a typed core language of Concurrent Haskell extended by concurrent futures. Evaluation in CHF is defined by a small-step reduction relation. Using contextual equivalence based on may- and should-convergence as program equivalence, we show that various transformations preserve program equivalence. We establish a context lemma easing those correctness proofs. An important result is that call-by-need and call-by-name evaluation are equivalent in CHF, since they induce the same program equivalence. Finally we show that the monad laws hold in CHF under mild restrictions on Haskell’s seq-operator, which for instance justifies the use of the do-notation.
The well-known proof of termination of reduction in simply typed calculi is adapted to a monomorphically typed lambda-calculus with case and constructors and recursive data types. The proof differs at several places from the standard proof. Perhaps it is useful and can be extended also to more complex calculi.
We make three points. First, the decade before the financial crisis in 2007 was characterized by a collapse in the yield on TIPS. Second, estimated VARs for the federal funds rate and the TIPS yield show that while monetary policy shocks had negligible effects on the TIPS yield, shocks to the latter had one-to-one effects on the federal funds rate. Third, these findings can be rationalized in a New Keynesian model.
There is ample empirical evidence documenting widespread financial illiteracy and limited pension knowledge. At the same time, the distribution of wealth is widely dispersed and many workers arrive on the verge of retirement with few or no personal assets. In this paper, we investigate the relationship between financial literacy and household net worth, relying on comprehensive measures of financial knowledge designed for a special module of the DNB (De Nederlandsche Bank) Household Survey. Our findings provide evidence of a strong positive association between financial literacy and net worth, even after controlling for many determinants of wealth. Moreover, we discuss two channels through which financial literacy might facilitate wealth accumulation. First, financial knowledge increases the likelihood of investing in the stock market, allowing individuals to benefit from the equity premium. Second, financial literacy is positively related to retirement planning, and the development of a savings plan has been shown to boost wealth. Overall, financial literacy, both directly and indirectly, is found to have a strong link to household wealth. JEL Classification: D91, D12, J26 Keywords: Financial Education, Savings and Wealth Accumulation, Retirement Preparation, Knowledge of Finance and Economics, Overconfidence, Stock Market Participation
This paper outlines a new method for using qualitative information to analyze the monetary policy strategy of central banks. Quantitative assessment indicators that are extracted from a central bank's public statements via the balance statistic approach are employed to estimate a Taylor-type rule. This procedure allows to directly capture a policymaker's assessments of macroeconomic variables that are relevant for its decision making process. As an application of the proposed method the monetary policy of the Bundesbank is re-investigated with a new dataset. One distinctive feature of the Bundesbank's strategy consisted of targeting growth in monetary aggregates. The analysis using the proposed method provides evidence that the Bundesbank indeed took into consideration monetary aggregates but also real economic activity and inflation developments in its monetary policy strategy since 1975. JEL Classification: E52, E58, N14 Keywords: Monetary Policy Rule, Statement Indicators, Bundesbank, Monetary Targeting
This paper analyzes the emergence of systemic risk in a network model of interconnected bank balance sheets. Given a shock to asset values of one or several banks, systemic risk in the form of multiple bank defaults depends on the strength of balance sheets and asset market liquidity. The price of bank assets on the secondary market is endogenous in the model, thereby relating funding liquidity to expected solvency - an important stylized fact of banking crises. Based on the concept of a system value at risk, Shapley values are used to define the systemic risk charge levied upon individual banks. Using a parallelized simulated annealing algorithm the properties of an optimal charge are derived. Among other things we find that there is not necessarily a correspondence between a bank's contribution to systemic risk - which determines its risk charge - and the capital that is optimally injected into it to make the financial system more resilient to systemic risk. The analysis has policy implications for the design of optimal bank levies. JEL Classification: G01, G18, G33 Keywords: Systemic Risk, Systemic Risk Charge, Systemic Risk Fund, Macroprudential Supervision, Shapley Value, Financial Network
Since World War II, direct stock ownership by households has largely been replaced by indirect stock ownership by financial institutions. We argue that tax policy is the driving force. Using long time-series from eight countries, we show that the fraction of household ownership decreases with measures of the tax benefits of holding stocks inside a pension plan. This finding is important for policy considerations on effective taxation and for financial economics research on the long-term effects of taxation on corporate finance and asset prices. JEL Classification: G10, G20, H22, H30 Keywords: Capital Gains Tax, Income Tax, Stock Ownership, Bond Ownership, Inflation, Bracket Creep, Pension Funds
Do firms buy their stock at bargain prices? : Evidence from actual stock repurchase disclosure
(2011)
We use new data from SEC filings to investigate how S&P 500 firms execute their open market repurchase programs. We find that smaller S&P 500 firms repurchase less frequently than larger firms, and at a price which is significantly lower than the average market price. Their repurchase activity is followed by a positive and significant abnormal return which lasts up to three months after the repurchase. These findings do not hold for large S&P 500 firms. Our interpretation is that small firms repurchase strategically, whereas the repurchase activity of large firms is more focused on the disbursement of free cash. JEL Classification: G14, G30, G35 Keywords: Stock Repurchases, Stock Buybacks, Payout Policy, Timing, Bid-Ask Spread, Liquidity
This paper studies the impact of the concentration of control, the type of controlling shareholder and the dividend tax preference of the controlling shareholder on dividend policy for a panel of 220 German firms over 1984-2005. While the concentration of control does not have an effect on the dividend payout, there is strong evidence that the type of controlling shareholder matters as family controlled firms have high dividend payouts whereas bank controlled firms have low dividend payouts. However, there is no evidence that the dividend preference of the large shareholder has an impact on the dividend decision. JEL Classification: G32, G35 Keywords: Dividend Policy, Payout Policy, Lintner Dividend Model, Tax Clientele Effects, Corporate Governance
This paper proposes a new approach for modeling investor fear after rare disasters. The key element is to take into account that investors’ information about fundamentals driving rare downward jumps in the dividend process is not perfect. Bayesian learning implies that beliefs about the likelihood of rare disasters drop to a much more pessimistic level once a disaster has occurred. Such a shift in beliefs can trigger massive declines in price-dividend ratios. Pessimistic beliefs persist for some time. Thus, belief dynamics are a source of apparent excess volatility relative to a rational expectations benchmark. Due to the low frequency of disasters, even an infinitely-lived investor will remain uncertain about the exact probability. Our analysis is conducted in continuous time and offers closed-form solutions for asset prices. We distinguish between rational and adaptive Bayesian learning. Rational learners account for the possibility of future changes in beliefs in determining their demand for risky assets, while adaptive learners take beliefs as given. Thus, risky assets tend to be lower-valued and price-dividend ratios vary less under adaptive versus rational learning for identical priors. Keywords: beliefs, Bayesian learning, controlled diffusions and jump processes, learning about jumps, adaptive learning, rational learning. JEL classification: D83, G11, C11, D91, E21, D81, C61
The European Monetary Union euro has done very well since its initiation. Price stability has been secured and the external value of the new currency is more than satisfactory. The confidence in it is also shown by its increasing use as a global reserve currency. It has been a stabilizing factor in the current crisis. The recent budgetary problems of some member states are principally not a problem of the Monetary Union. It is therefore in no way justified to speak of a "Euro-crisis". It is true, however, that the Monetary Union restricts the number of possibilities for member states to solve their financial problems but it does not eliminate them entirely that outside help would have become indispensible. The purchase of debt instruments of member states in financial distress by the ECB is questionable from an economic, and more important, from a legal point of view. The longer the duration, the less legally justifiable is it. Financial support for member states in severe financial distress might be acceptable as a temporary crisis resolution mechanism. A permanent support mechanism needs a basis in the primary law of the EU. The treatment of the risk of "sovereign" debt in the legal framework for financial institutions urgently needs improvement. Especially the capital requirements for credit institutions have to be adjusted.
Based on Foucault’s analysis of German Neoliberalism and his thesis of ambiguity, the following paper draws a two-level distinction between individual and regulatory ethics. The individual ethics level – which has received surprisingly little attention – contains the Christian foundation of values and the liberal-Kantian heritage of so called Ordoliberalism – as one variety of neoliberalism. The regulatory or formal-institutional ethics level on the contrary refers to the ordoliberal framework of a socio-economic order. By differentiating these two levels of ethics incorporated in German Neoliberalism, it is feasible to distinguish dissimilar varieties of neoliberalism and to link Ordoliberalism to modern economic ethics. Furthermore, it allows a revision of the dominant reception of Ordoliberalism which focuses solely on the formal-institutional level while mainly neglecting the individual ethics level.
The past thirty years have seen dramatic changes to the character of state membership regimes in which practices of easing access to membership for resident non-citizens, extending the franchise to expatriate citizens as well as, albeit in typically more limited ways, to resident non-citizens and an increasing toleration of dual nationality have become widespread. These processes of democratic inclusion, while variously motivated, represent an important trend in the contemporary political order in which we can discern two distinct shifts. The first concerns membership as a status and is characterised in terms of the movement from a simple distinction between single-nationality citizens and single-nationality aliens to a more complex structure of state membership in which we also find dual nationals and denizens (Baubock, 2007a:2395-6). The second shift relates to voting rights and is marked by the movement from the requirement that voting rights are grounded in both citizenship and residence to the relaxing of the joint character of this requirement such that citizenship or residence now increasingly serve as a basis for, at least partial, enfranchisement. In the light of these transformations, it is unsurprising that normative engagement with transnational citizenship – conceived in terms of the enjoyment of membership statuses in two (or more) states – has focused on the issues of access to, and maintenance of, national citizenship, on the one hand, and entitlement to voting rights, on the other hand.
Children […] growing up with highly inflected languages such as Modern Greek will frequently hear different grammatical forms of a given lexeme used in different grammatical and semantic-pragmatic contexts. In spite of the fact that the Greek noun is not as highly inflected as the verb, acquisition of nominal inflection of this inflecting-fusional language is quite complex, comprising the three categories of case, number, and gender. As is usual in this type of language, the formation of case-number forms obeys different patterns that apply to largely arbitrary classes of nominal lexemes partially based on gender. Further, frequency of the occurrence of the three gender classes and case-number forms of nouns greatly differs in spoken Greek, regarding both the types and tokens. […] [A] child learning an inflecting-fusional language like Greek must construct different inflectional patterns depending not only on parts of speech but also on subclasses within a given part of speech, such as gender classes of nouns and inflectional classes within or (exceptionally) across genders. It is therefore to be expected that the early development of case and number distinctions will apply to specific nouns and subclasses of nouns rather than the totality of Greek nouns. The two main theoretical approaches of morphological development that will be discussed in the present paper are the usage-based approach and the pre- and protomorphology approach.
In this paper I present five alternations of the verb system of Modern Greek, which are recurrently mapped on the syntactic frame NPi__NP. The actual claim is that only the participation in alternations and/or the allocation to an alternation variant can reliably determine the relation between a verb derivative and its base. In the second part, the conceptual structures and semantic/situational fields of a large number of “-ízo” derivatives appearing inside alternation classes are presented. The restricted character of the conceptual and situational preferences inside alternations classes suggests the dominant character of the alternations component.
Most systematic discussion of dyad morphemes has focussed on Australian languages, owing to a combination of their relative prevalence there, and the development of a descriptive tradition that investigates them in some depth. In the course of researching this paper, however, I became aware of functionally and semantically similar morphemes in many other parts of the world, almost invariably described in isolation from any typological reference point. I have incorporated such data as far as I am aware of it, in the hope that a systematic study will encourage other investigators to identify, and investigate in detail, similar constructions in a range of languages. The current state of our research, however, as well as some interesting geographical skewings that I discuss below, such that outside Australia dyad constructions almost exclusively employ reciprocal morphology, means that most of this paper will focus on Australian languages.
"Buffer-stock" models of saving are now standard in the consumption literature. This paper builds theoretical foundations for rigorous understanding of the main features of such models, including the existence of a target wealth ratio and the proposition that aggregate consumption growth equals aggregate income growth in a small open economy populated by buffer stock savers. JEL Classification: D81, D91, E21 Keywords: Precautionary Saving, Buffer Stock Saving, Marginal Propensity to Consume, Permanent Income Hypothesis
Measuring confidence and uncertainty during the financial crisis: evidence from the CFS survey
(2011)
The CFS survey covers individual situations of banks and other companies of the financial sector during the financial crisis. This provides a rare possibility to analyze appraisals, expectations and forecast errors of the core sector of the recent turmoil. Following standard ways of aggregating individual survey data, we first present and introduce the CFS survey by comparing CFS indicators of confidence and predicted confidence to ifo and ZEW indicators. The major contribution is the analysis of several indicators of uncertainty. In addition to well established concepts, we introduce innovative measures based on the skewness of forecast errors and on the share of ‘no response’ replies. Results show that uncertainty indicators fit quite well with pattern of real and financial time series of the time period 2007 to 2010. Business Sentiment , Financial Crisis , Survey Indicator , Uncertainty CFS working paper series, 2010, 18. Revised Version July 2011
I investigate the effect of transparency on the borrowing costs of Emerging Markets Economies. Transparency is measured by whether or not the countries publish the IMF Article IV Staff report and the Reports on the Observance of Standards and Codes (ROSC). Using difference-in-difference estimation, I study the effect on the sovereign credit spreads for 18 Emerging Market Economies over the period 1999-2007. I show that the effect of publishing the Article IV reports is negligible while publishing the ROSC matters, leading to a reduction in the spreads of over 15% in the samples 1999-2006 and 1999-2007. JEL Classification: F33, F34, G15 Keywords: Sovereign Bond Markets, Transparency, Emerging Market Economies
This paper outlines important lessons for monetary policy. In particular, the role of inflation targeting, which was much acclaimed prior to the financial crisis and since then has not lost much of its endorsement, is critically reviewed. Ignoring the relation between monetary policy and asset prices, as is the case in this monetary policy approach, can lead to financial instability. In contrast, giving, inter alia, monetary factors a role in central banks’ policy decisions, as is done in the ECB’s encompassing approach, helps prevent these potentially harmful side effects and thus allows for fostering financial stability. Finally, this paper makes a case against increasing the central banks’ inflation target. JEL Classification: E44, E52, E58 Keywords: Inflation Targeting, Asset Prices, Financial Stability, ECB
This paper discusses the effect of capital regulation on the risk taking behavior of commercial banks. We first theoretically show that capital regulation works differently in different market structures of banking sectors. In lowly concentrated markets, capital regulation is effective in mitigating risk taking behavior because banks' franchise values are low and banks have incentives to pursue risky strategies in order to increase their franchise values. If franchise values are high, on the other hand, the effect of capital regulation on bank risk taking is ambiguous as banks lack those incentives. We then test the model predictions on a cross-country sample including 421 commercial banks from 61 countries. We find that capital regulation is effective in mitigating risk taking only in markets with a low degree of concentration. The results remain robust after accounting for financial sector development, legal system effciency, and for other country and bank-specific characteristics. Keywords: Banks, market structure, risk shifting, franchise value, capital regulation
The title I have chosen seems to signal a tension, even a contradiction, in a number of respects. Democracy appears to be a form of political organisation and government in which, through general and public participatory procedures, a sufficiently legitimate political will is formed which acquires the force of law. Justice, by contrast, appears to be a value external to this context which is not so much linked to procedures of “input” or “throughput” legitimation but is understood instead as an output- or outcome-oriented concept. At times, justice is even understood as an otherworldly idea which, when transported into the Platonic cave, merely causes trouble and ends up as an undemocratic elite project. In methodological terms, too, this difference is sometimes signalled in terms of a contrast between a form of “worldly” political thought and “abstract” and otherworldly philosophical reflection on justice. In my view, we are bound to talk past the issues to be discussed under the heading “transnational justice and democracy” unless we first root out false dichotomies such as the ones mentioned. My thesis will be that justice must be “secularised” or “grounded” both with regard to how we understand it and to its application to relations beyond the state.
Prepared by Christian Laux, Vienna University of Economics and Business & Center for Financial Studies (CFS) for the “Workshop on Liquidity Premium in Solvency II: Conceptual and Measurement Issues,” DNB Amsterdam, March 18, 2011. The insurance industry and the Committee of European Insurance and Occupational Pension Supervisors (CEIOPS) propose to add a liquidity premium to the risk-free rate when discounting liabilities in times of financial turmoil. The objective is to counterbalance adverse effects on regulatory capital due to a decrease in asset values caused by illiquidity in a crisis. As I argue in this note, although the motive might be sensible, the proposal to add a liquidity premium when discounting liabilities is not the right approach to tackle the problem.
The aim of this paper is to examine what has been the role of information provision to the market throughout the crisis. We consider two main sources of information to the market, financial statements and information provided by credit rating agencies. We examine how these sources of information work and the effectiveness of their disclosure process during the crisis. Contrary to the commonly held view, fair value accounting did not have a major impact on the crisis development and severity. However, the structure and lack of accountability of credit rating agencies had a profound impact on their incentives, which may have jeopardized the accuracy of the whole rating process. We claim that the crisis experience has changed the way we think about information as well as market discipline and discuss policy implications and proposals for regulation. JEL Classification: G01, G24, G28, M41, M48
In this paper we challenge the view that corporate bonds are always arm’s length debt. We analyze the effect of bond ratings on the stock price return to acquirers in M&A transactions, which tend to have significant effects on creditor wealth. We find acquirers abnormal returns to be higher if they are unrated, controlling for a wide variety of other effects identified in the literature. Tracing the difference in returns to distinct managerial decisions, we find that, everything else constant, rated firms increase their leverage in takeover transactions by less than their unrated counterparts. Consistent with a significant role for rating agencies, we find monitoring effects to be strongest when acquirer bonds are rated at the borderline between investment grade and junk. Finally, we are able to empirically exclude a large number of alternative explanations for the empirical regularities that we uncover. JEL Classification: G21, G24, G32, G34 Keywords: Acquisitions, Credit Ratings, Mergers and Acquisitions, Arm’s Length Debt, Abnormal Returns
It has become commonplace to say that, in the past, international governance has been legitimated mainly, if not exclusively, by its welfare-enhancing ‘output’. There has been very little research, however, on the history of legitimating international governance by its output to validate this point. In this essay I begin to address this gap by inquiring into the origins of output-oriented strategies for legitimating international organizations. Scrutinizing the programmatic literature on international organizations from the early 20th century, I illustrate how a new and distinctive account of technocratic legitimation emerged and in the 1920s separated from other types of liberal internationalism. My inquiry, centring on the works of James Arthur Salter, David Mitrany, Paul S. Reinsch and Pitman B. Potter, explores their respective conceptions of ‘good functional governance’, executed by a non-political international technocracy. Their account is explicitly pitched against a notion of ‘international politics’, perceived as violent, polarizing, and irrational. The emergence of such a technocratic legitimation of international governance, I submit, needs to be seen in the context of societal modernization and bureaucratization that unfolded in the first half of the 20th century. I also highlight how in this account the material output of governance is intimately linked to the virtues of the organizational form that brings it about.
In the microstructure literature, information asymmetry is an important determinant of market liquidity. The classic setting is that uninformed dedicated liquidity suppliers charge price concessions when incoming market orders are likely to be informationally motivated. In limit order book markets, however, this relationship is less clear, as market participants can switch roles, and freely choose to immediately demand or patiently supply liquidity by submitting either market or limit orders. We study the importance of information asymmetry in limit order books based on a recent sample of thirty German DAX stocks. We find that Hasbrouck’s (1991) measure of trade informativeness Granger-causes book liquidity, in particular that required to fill large market orders. Picking-off risk due to public news induced volatility is more important for top-of-the book liquidity supply. In our multivariate analysis we control for volatility, trading volume, trading intensity and order imbalance to isolate the effect of trade informativeness on book liquidity. JEL Classification: G14 Keywords: Price Impact of Trades , Trading Intensity , Dynamic Duration Models, Spread Decomposition Models , Adverse Selection Risk
We revisit the role of time in measuring the price impact of trades using a new empirical method that combines spread decomposition and dynamic duration modeling. Previous studies which have addressed the issue in a vector-autoregressive framework conclude that times when markets are most active are times when there is an increased presence of informed trading. Our empirical analysis based on recent European and U.S. data offers challenging new evidence. We find that as trade intensity increases, the informativeness of trades tends to decrease. This result is consistent with the predictions of Admati and Pfleiderer’s (1988) rational expectations model, and also with models of dynamic trading like those proposed by Parlour (1998) and Foucault (1999). Our results cast doubt on the common wisdom that fast markets bear particularly high adverse selection risks for uninformed market participants. JEL Classification: G10, C32 Keywords: Price Impact of Trades, Trading Intensity, Dynamic Duration Models, Spread Decomposition Models, Adverse Selection Risk
We present an intertemporal consumption model of consumer investment in financial literacy. Consumers benefit from such investment because their stock of financial literacy allows them to increase the returns on their wealth. Since literacy depreciates over time and has a cost in terms of current consumption, the model determines an optimal investment in literacy. The model shows that financial literacy and wealth are determined jointly, and are positively correlated over the life cycle. Empirically, the model leads to an instrumental variables approach, in which the initial stock of financial literacy (as measured by math performance in school) is used as an instrument for the current stock of literacy. Using microeconomic and aggregate data, we find a strong effect of financial literacy on wealth accumulation and national saving, and also show that ordinary least squares estimates underestate the impact of financial literacy on saving. JEL Classification: E2, D8, G1, J24 Keywords: Financial Literacy, Cognitive Abilities, Human Capital, Saving
We analytically show that a common across rich/poor individuals Stone-Geary utility function with subsistence consumption in the context of a simple two-asset portfolio-choice model is capable of qualitatively and quantitatively explaining: (i) the higher saving rates of the rich, (ii) the higher fraction of personal wealth held in risky assets by the rich, and (iii) the higher volatility of consumption of the wealthier. On the contrary, time-variant “keeping-up-with-the-Joneses” weighted average consumption which plays the role of moving benchmark subsistence consumption gives the same portfolio composition and saving rates across the rich and the poor, failing to reconcile the model with what micro data say. JEL Classification: G11, D91, E21, D81, D14, D11
All-over in Europe, unemployment became a growing problem from the mid 1980s to the mid 1990s. Nevertheless, the effects on the economical situation of the unemployed and the whole population are quite different in European countries. In this paper we first give a brief overview over the development of unemployment rates in eight member states of the European Union and over the different reactions to provide the social protection of the unemployed. Therefore we look at the social security expenditures, the level of income replacement for the unemployed and recent social policy reforms concerning them. In the second section of the paper, we examine the development of income distribution and poverty taking different poverty lines into consideration. There is no general pattern neither for the relationship of inequality among the unemployed to the whole economically active population nor for the development from the 80s to the 90s. But one can say that in countries with increasing income inequality also poverty is rising (especially in the UK) and that where inequality among the unemployed is less pronounced the proportions of the poor went down from the mid 80s to the mid 90s (France and Ireland). In nearly all countries the risk of being poor is ernormously high for the unemployed, Denmark is the only exception.
To sum up our findings we come to the following statements. - During the period from 1973 to 1993 inequality of the personal distribution of equivalent pre-government income increased to some extent, as was to be expected given the enormous rise in unemployment. - Inequality of post-government income also increased slightly, but was much lower than inequality of pre-government income due to the equalizing effect of the German tax and transfer system. - In 1993 inequality of pre-government income was higher, and inequality of post-government income was considerably lower in East Germany than in West Germany; the West German tax and transfer system that was transferred to East Germany after reunification - with some additional but temporary minimum regulations - seems to have had a stronger equalizing effect in the East than in the West. - A decomposition into three age groups, the young and the middle-aged group sub-divided further according to whether household members were affected by unemployment, showed that within-groups inequality explained by far more of overall inequality than between-groups inequality. - The relative positions of the two young groups as well as of the middle-aged group with unemployed members deteriorated with respect to their equivalent pre-government and post-government incomes. - During the first period with rising unemployment (1973 to 1978), the development of within-groups inequality and of between-groups inequality contributed to about the same extent to the increase of overall inequality of pre-government income. But this was fully compensated by the tax and transfer system as there were only a negligible change in inequality of equivalent net income and very slight effects of the (four) components of change which nearly compensated each other. - During the last period from 1988 to 1993 the equalizing effect of the German tax and transfer system seems to have weakened, at least in the western part of Germany. The increase in inequality of equivalent net income is mainly due to developments of within group inequalities.
Ernst Bloch pointed out in a particularly emphatic way that the concept of human dignity featured centrally in historical struggles against different forms of unjustified rule, i.e. domination – to which one must add that it continues to do so to the present day. The “upright gait,” putting an end to humiliation and insult: this is the most powerful demand, in both political and rhetorical terms, that a “human rights-based” claim expresses. It marks the emergence of a radical, context-transcending reference point immanent to social conflicts which raises fundamental questions concerning the customary opposition between immanent and transcendent criticism. For within the idiom of demanding respect for human dignity, a right is invoked “here and now,” in a particular, context-specific form, which at its core is owed to every human being as a person. Thus Bloch is in one respect correct when he asserts that human rights are not a natural “birthright” but must be achieved through struggle; but in another respect this struggle can develop its social power only if it has a firm and in a certain sense “absolute” normative anchor. Properly understood, it becomes apparent that these social conflicts always affect “two worlds”: the social reality, on the one hand, which is criticized in part or radically in the light of an ideal normative dimension, on the other. For those who engage in this criticism there is no doubt that the normative dimension is no less real than the reality to which they refuse to resign themselves. Those who critically transcend reality always also live elsewhere.
The overvaluation hypothesis (Miller 1977) predicts that a) stocks are overvalued in the presence of short selling restrictions and that b) the overvaluation increases in the degree of divergence of opinion. We design an experiment that allows us to test these predictions in the laboratory. The results indicate that prices are higher with short selling constraints, but the overvaluation does not increase in the degree of divergence of opinion. We further find that trading volume is lower and bid-ask spreads are higher when short sale restrictions are imposed. JEL Classification: C92, G14 Keywords: Overvaluation Hypothesis , Short Selling Constraints , Divergence of Opinion
Regulations in the pre-Sarbanes–Oxley era allowed corporate insiders considerable flexibility in strategically timing their trades and SEC filings, for example, by executing several trades and reporting them jointly after the last trade. We document that even these lax reporting requirements were frequently violated and that the strategic timing of trades and reports was common. Event study abnormal re-turns are larger after reports of strategic insider trades than after reports of otherwise similar nonstrategic trades. Our results also imply that delayed reporting is detrimental to market efficiency and lend strong support to the more stringent trade reporting requirements established by the Sarbanes–Oxley Act. JEL Classification: G14, G30, G32 Keywords: Insider Trading , Directors' Dealings , Corporate Governance , Market Efficiency
This paper studies the market quality of an internalization system which is designed as part of an open limit order book (the Xetra system operated by Deutsche Börse AG). The internalization sys-tem (Xetra BEST) guarantees a price improvement over the inside spread in the Xetra order book. We develop a structural model of this unique dual market environment and show that, while adverse selection costs of internalized trades are significantly lower than those of regular order book trades, the realized spreads (the revenue earned by the suppliers of liquidity) is significantly larger. The cost savings of the internalizer are larger than the mandatory price improvement. This suggests that internalization can be profitable both for the customer and the internalizer. JEL Classification: G10
This paper reconsiders the effect of investor sentiment on stock prices. Using survey-based sentiment indicators from Germany and the US we confirm previous findings of predictability at intermediate time horizons. The main contribution of our paper is that we also analyze the immediate price reaction to the publication of sentiment indicators. We find that the sign of the immediate price reaction is the same as that of the predictability at intermediate time horizons. This is consistent with sentiment being related to mispricing but is inconsistent with the alternative explanation that sentiment indicators provide information about future expected returns. JEL Classification: G12, G14 Keywords: Investor Sentiment , Event Study , Return Predictability
This paper examines to what extent the build-up of "global imbalances" since the mid-1990s can be explained in a purely real open-economy DSGE model in which agents’ perceptions of long-run growth are based on filtering observed changes in productivity. We show that long-run growth estimates based on filtering U.S. productivity data comove strongly with long-horizon survey expectations. By simulating the model in which agents filter data on U.S. productivity growth, we closely match the U.S. current account evolution. Moreover, with household preferences that control the wealth effect on labor supply, we can generate output movements in line with the data. JEL Classification: E13, E32, D83, O40
In this lecture, the context and conditions of becoming a teacher from the time of being selected into the programme, through the process of training and being retained to teach are discussed within the framework of Teacher Education in Nigeria. First, the concepts and the history of teacher education are examined. Then, some critical issues as well as my personal research efforts on teacher education are discussed. Finally, recommendations for meeting the challenges of Teacher Education in Nigeria are made.
Education is the major issue in this lecture, it is followed by national development, which is its target, and Educational Planning which is the chief tool for getting to the target. Education had developed in Nigeria from 1842 to 1959 without the operators consciously directing it to national development but because of the new needs, new aspiration and new attitudes in an independent Nigeria; education was then directed towards national development. In the 60s all the efforts made to prepare the kind of education to serve the interest of National development failed because there was no effective method to do this. But in the 70s educational planning was discovered as an effective technique for preparing or planning an appropriate education for national development in terms of policies, programmes, enrolment, skill acquisition and manpower development.
CONTENTS Preamble 1. Concept and Drivers of Globalization 1.0 A Brief Historical Perspective 1.1 Concept of Globalization 1.2 Economic Globalization 1.3 Drivers of Economic Globalization 2. Globalization and Markets 2.1 The Free Market System 2.2 Markets and the Solution of Economic Problems 2.3 African Markets and “Getting the Prices Right”. 2.4 Implications of the Imperfect Market System 2.5 Government’s Inevitable Role 2.6 The International Environment/Markets 3. Globalization and Trade Liberalisation 3.1 The Experience of the Developing Countries 3.2 Nigeria’s Experience with Trade Liberalisation 4. Global Economic Integration and Sub-Saharan Africa 4.1 Global Economic Integration 4.2 Africa’s Integration with the World Economy 4.3 The Benefits of Economic Globalization and Sub-Saharan Africa 4.4 Why has Africa Lagged? 5. Nigeria and the Global Economy 5.1 Openness of the Economy and Integration with the World Economy 5.2 Globalization and Nigeria’s Trade 5.3 Globalization and Foreign Capital Flows to Nigeria 5.4 Foreign Capital Flows and Debt Accumulation 5.5 Globalization, Growth and Development 6. Appropriate Policy Responses and Lessons 7. Concluding Remarks 8. Appreciation 9. Annex 10. References
The recent financial crisis has highlighted the limits of the “originate to distribute” model of banking, but its nexus with the macroeconomy and monetary policy remains unexplored. I build a DSGE model with banks (along the lines of Holmström and Tirole [28] and Parlour and Plantin [39] and examine its properties with and without active secondary markets for credit risk transfer. The possibility of transferring credit reduces the impact of liquidity shocks on bank balance sheets, but also reduces the bank incentive to monitor. As a result, secondary markets allow to release bank capital and exacerbate the effect of productivity and other macroeconomic shocks on output and inflation. By offering a possibility of capital recycling and by reducing bank monitoring, secondary credit markets in general equilibrium allow banks to take on more risk. Keywords: Credit Risk Transfer , Dual Moral Hazard , Monetary Policy , Liquidity , Welfare JEL Classification: E3, E5, G3 First Draft: December 2009, This Draft: September 2010
Exit strategies
(2010)
We study alternative scenarios for exiting the post-crisis fiscal and monetary accommodation using the model of Angeloni and Faia (2010), that combines a standard DSGE framework with a fragile banking sector, suitably modified and calibrated for the euro area. Credibly announced and fast fiscal consolidations dominate – based on simple criteria – alternative strategies incorporating various degrees of gradualism and surprise. The fiscal adjustment should be based on spending cuts or else be relatively skewed towards consumption taxes. The phasing out of monetary accommodation should be simultaneous or slightly delayed. We also find that, contrary to widespread belief, Basel III may well have an expansionary macroeconomic effect. Keywords: Exit Strategies , Debt Consolidation , Fiscal Policy , Monetary Policy , Capital Requirements , Bank Runs JEL Classification: G01, E63, H12
We show that if an agent is uncertain about the precise form of his utility function, his actual relative risk aversion may depend on wealth even if he knows his utility function lies in the class of constant relative risk aversion (CRRA) utility functions. We illustrate the consequences of this result for asset allocation: poor agents that are uncertain about their risk aversion parameter invest less in risky assets than wealthy investors with identical risk aversion uncertainty. Keywords: Risk Aversion , Preference Uncertainty , Risk-taking , Asset Allocation JEL Classification: D81, D84, G11 This Version: November 25, 2010
According to disposition effect theory, people hold losing investments too long. However, many investors eventually sell at a loss, and little is known about which psychological factors contribute to these capitulation decisions. This study integrates prospect theory, utility maximization theory, and theory on reference point adaptation to argue that the combination of a negative expectation about an investment’s future performance and a low level of adaptation to previous losses leads to a greater capitulation probability. The test of this hypothesis in a dynamic experimental setting reveals that a larger total loss and longer time spent in a losing position lead to downward adaptations of the reference point. Negative expectations about future investment performance lead to a greater capitulation probability. Consistent with the theoretical framework, empirical evidence supports the relevance of the interaction between adaptation and expectation as a determinant of capitulation decisions. Keywords: Investments , Adaptation , Reference Point , Capitulation , Selling Decisions , Disposition Effect , Financial Markets JEL Classification: D91, D03, D81
We investigate the incentives for vertical or horizontal integration in the financial security service industry, consisting of trading, clearing and settlement. We thereby focus on firms’ decisions but also look on the implications of these decisions on competition and welfare. Our analysis shows that the incentives for vertical integration crucially depend on industry as well as market characteristics. A more pronounced demand for liquidity clearly favors vertical integration whereas deeper financial integration increases the incentives to undertake vertical integration only if the efficiency gains associated with vertical integration are sufficiently large. Furthermore, we show that market forces can suffer from a coordination problem that end in vertically integrated structures that are not in the best interest of the firms. We believe this problem can be addressed by policy measures such as the TARGET2-Securities program. Furthermore, we use our framework to discuss major industry trends and policy initiatives. Keywords: Vertical Integration , Horizontal Integration , Competition , Trading , Settlement JEL Classification: G15, L13, L22
During the last decades households in the U.S. have experienced that residential house prices move in a persistent manner, i.e. that returns are positively serially correlated. Since an owner-occupied home is usually the largest investment of a household it is important to understand how households act when they base their consumption and investment decisions on this experience. We show in a setting with housing market cycles and households who can decide whether they rent or own the home, that - besides the consumption and the precautionary savings motive - serial correlation in house prices generates a new speculative motive for homeownership. In particular, we show how good and bad housing market cycles affect homeownership rates, leverage, stock investments and consumption and can explain empirically observed household behavior during housing market boom and bust periods. Keywords: Asset Allocation , Portfolio Choice , Housing Market Cycles , Real Estate JEL Classification: G11, D91
We test whether asymmetric preferences for losses versus gains as in Ang, Chen, and Xing (2006) also affect the pricing of cash flow versus discount rate news as in Campbell and Vuolteenaho (2004). We construct a new four-fold beta decomposition, distinguishing cash flow and discount rate betas in up and down markets. Using CRSP data over 1963–2008, we find that the downside cash flow beta and downside discount rate beta carry the largest premia. We subject our result to an extensive number of robustness checks. Overall, downside cash flow risk is priced most consistently across different samples, periods, and return decomposition methods, and is the only component of beta that has significant out-of-sample predictive ability. The downside cash flow risk premium is mainly attributable to small stocks. The risk premium for large stocks appears much more driven by a compensation for symmetric, cash flow related risk. Finally, we multiply our premia estimates by average betas to compute the contribution of the different risk components to realized average returns. We find that up and down discount rate components dominate the contribution to average returns of downside cash flow risk. Keywords: Asset Pricing, Beta, Downside Risk, Upside Risk, Cash Flow Risk, Discount Rate Risk JEL Classification: G11, G12, G14
Capturing the zero: a new class of zero-augmented distributions and multiplicative error processes
(2010)
We propose a novel approach to model serially dependent positive-valued variables which realize a non-trivial proportion of zero outcomes. This is a typical phenomenon in financial time series observed on high frequencies, such as cumulated trading volumes or the time between potentially simultaneously occurring market events. We introduce a flexible pointmass mixture distribution and develop a semiparametric specification test explicitly tailored for such distributions. Moreover, we propose a new type of multiplicative error model (MEM) based on a zero-augmented distribution, which incorporates an autoregressive binary choice component and thus captures the (potentially different) dynamics of both zero occurrences and of strictly positive realizations. Applying the proposed model to high-frequency cumulated trading volumes of liquid NYSE stocks, we show that the model captures both the dynamic and distribution properties of the data very well and is able to correctly predict future distributions. Keywords: High-frequency Data , Point-mass Mixture , Multiplicative Error Model , Excess Zeros , Semiparametric Specification Test , Market Microstructure JEL Classification: C22, C25, C14, C16, C51
The first part of the following paper deals with varying points of criticism forwarded against Ordoliberalism. Here, it is not the aim to directly falsify each argument on its own; rather, the author tries to give a precise overview of the spectrum of critique. The second section picks out one argument of critical review – namely that the ordoliberal concept of the state is somewhat elitist and grounded on intellectual experts. Based on the previous sections, the final part differentiates two kinds of genesis of norms: an evolutionary and an elitist one – both (latently) present within Ordoliberalism. In combination with the two-level differentiation between individual and regulatory ethics, the essay allows for a distinction between individual-ethical norms based on an evolutionary genesis of norms and regulatory-ethical norms based on an elitist understanding of norms. A by-product of the author’s argument is a (further) demarcation within neoliberalism.
This paper discusses the implications of transnational media production and diasporic networks for the cultural politics of migrant minorities. How are fields of cultural politics transformed if Hirschmann’s famous options ‘exit’ and ‘voice’ are no longer constituting mutually exclusive responses to dissent within a nation-state, but modes of action that can combine and build upon each other in the context of migration and diasporic media activism? Two case studies are discussed in more detail, relating to Alevi amateur television production in Germany and to a Kurdish satellite television station that reaches out to a diaspora across Europe and the Middle East. Keywords: migrant media, transnationalism, Alevis, Kurds, Turkey, Germany
On the backdrop of the 2008 financial crisis this paper introduces an understanding of societal crises as a reduction in the meaning production of social entities, which can either be internally or externally provoked. The emergence of constitutions and, more generally, constitutional structures, can be understood as responses to both forms of crisis. This is the case because they are double-edged structures which are simultaneously oriented towards the maintenance of internal order and stability within a given social entity at the same time as they frame the transfer of the meaning components between the social entities and their environments. Thus, the 2008 financial crisis indicates a failure of constitutional bonding. When observed from an overall structural perspective, the reasons for this failure can be traced back to an increased discrepancy between the structural composition of world society and the constitutional structures in place. The crisis reflects a failure to respond to two simultaneous, inter-related and mutually re-inforcing structural transformations. First, there is the increased globalisation, which has led to massive dis-locations in the relative centrality of the different national configurations for the reproductive processes of functional systems. Second, there is a structural transformation of the transnational layer of world society through a reduced reliance on the centre/periphery differentiation and an increased reliance on functional differentiation. One of the many consequences of this development is the emergence of new forms of transnational law and politics. A new constitutional architecture which reflects these transformations is needed in order to ensure an adequate constitutional bonding of economic processes, as well as of other social processes.
The concept of embeddedness plays a central role in the segment of economic sociology and social theory which is inspired by the works of Karl Polanyi. But to the extent that embeddedness is understood in a substantialist manner, implying the existence of a unitary lifeworld, the desire for embeddedness is an impossible aspiration under modern conditions. Throughout the modern era it is however possible to observe the emergence of complex societal stabilization mechanisms, which serve as substitutes to traditional forms of embeddedness. The emergence of function specific cultures, in the form of, for example, legal, political and scientific cultures, establishing a ‘second nature’ in the Hegelian sense, is one example of this. Other examples are (neo-)corporatist institutions which fulfilled a central stabilising role in classical modernity and the kind of network based governance arrangements which fulfil a similar position in today’s radicalised modernity.
On the backdrop of the 2008 financial crisis this paper introduces an understanding of societal crises as a reduction in the meaning production of social entities, which can either be internally or externally provoked. The emergence of constitutions and, more generally, constitutional structures, can be understood as responses to both forms of crisis. This is the case because they are double-edged structures which are simultaneously oriented towards the maintenance of internal order and stability within a given social entity at the same time as they frame the transfer of the meaning components between the social entities and their environments. Thus, the 2008 financial crisis indicates a failure of constitutional bonding. When observed from an overall structural perspective, the reasons for this failure can be traced back to an increased discrepancy between the structural composition of world society and the constitutional structures in place. The crisis reflects a failure to respond to two simultaneous, inter-related and mutually re-inforcing structural transformations. First, there is the increased globalisation, which has led to massive dis-locations in the relative centrality of the different national configurations for the reproductive processes of functional systems. Second, there is a structural transformation of the transnational layer of world society through a reduced reliance on the centre/periphery differentiation and an increased reliance on functional differentiation. One of the many consequences of this development is the emergence of new forms of transnational law and politics. A new constitutional architecture which reflects these transformations is needed in order to ensure an adequate constitutional bonding of economic processes, as well as of other social processes.
Revised version of a paper presented at the Conference "The Distribution of Economic Well-Being in the 1980s - an International Perspective", June 21 - 23, 1993, in Fiskebäckskil, Sweden. This paper sketches changes in the distribution of well-being during the period from 1972 to 1991 against the background of West Germany's economic and demographic development, and compares the distribution of well-being in East Germany before and after reunification. We rely on equivalent income of persons as the main indicator to measure well-being, but we also look at the distribution of gross wage income of workers and employees. Estimates of the Federal Statistical Office referring to the mesolevel of average equivalent income of socio-economic groups as well as various distributional measures computed by us at the micro-level are used to gauge changes of the distribution. The computations are based on two sets of micro-data available to us, the official Income and Consumption Surveys (1973, 1978 and 1983), and the German Socio-economic Panel (1983 to 1990 for West Germany, 1990, 1991 for East Germany). At the meso-level we find substantial changes in the relative welfare positions of the ten socio-economic groups distinguished, but a nearly constant ranking of the groups during the whole period under review. At the micro-level our computations indicate slight increases in the inequality of gross earnings during both decades. The distribution of well-being as measured by equivalent income of persons seems also to have become slightly more unequal during the whole period but the changes are very small, and partly reversed during subperiods. A decomposition of overall inequality by occupational status of the heads of household using the Theil measure shows that more than 80 percent of overall inequality is due to within-group inequality with rising tendency. This result is mitigated a little when dis aggregating the heterogeneous group of not gainfully employed with regard to the main income source of the household.
Did earnings inequality in the Federal Republic of Germany increase from the 1960s to the 1980s?
(1996)
This paper aims to provide a descriptive analysis of the changing patterns of labour market participation, non-participation and unemployment in Great Britain, Sweden and Germany. Since the mid 1970s, most European countries have experienced two parallel developments: on the one hand they have witnessed a huge growth in the proportion of women participating on the labour market. On the other however, they have experienced the return of mass unemployment and a growing insecurity of employment for those in work. In this paper, a typology of work histories is constructed using decade periods. Retrospective and panel data from Germany, Britain and Sweden are then used to compare the effects of different employment and welfare regimes on the proportions of respondents with different types of work histories and how these are combined with unemployment.
This paper fits within a broader research programme concerned with the processes that link labour market precarity and social exclusion. Labour market insecurity manifests itself most directly in the form of unemployment, and other elements in the programme seek to measure the impact of precarity, and unemployment in particular, on poverty and social exclusion in the eight countries covered. One of the principal concerns of the programme is however the extent to which institutional differences across countries with respect to the labour market and social protection are a significant factor mediating the relationship between labour market precarity and social exclusion. This paper focuses on the effectiveness of cash transfers, the central element of social protection systems, in alleviating the effects of unemployment on income poverty. The structures of social protection systems vary greatly across European Union member states, and in many cases have altered significantly in recent years in response to high unemployment (see Hauser et al, 1998). Using data from the mid-1980s and the mid-1990s for six member countries, the paper compares the effectiveness of different systems in lifting or keeping the unemployed out of poverty, and how this has been affected by the way systems have responded to the challenges produced by developments in the labour market in the past decade. The specific role of social insurance-based unemployment-linked transfers versus other cash transfers is also considered, to assess the extent to which social insurance has been able to cope with changes in the labour market over the period. The data come from a variety of national large-scale household surveys. The paper is structured as follows. Section 2 discusses the data and methods to be employed in measuring the impact of cash transfers on poverty risks for the unemployed. Section 3 looks at the overall risks of poverty for the unemployed before and after cash transfers, and how these changed between the mid-1980s and mid-1990s. Section 4 looks at the role of social insurance-based unemployment payments versus other cash transfers. Section 5 examines the extent to which the impact of transfers varies by gender and by duration of unemployment. Section 6 highlights the key patterns identified and what these tell us about the relationship between the type of welfare regime a country operates and effectiveness in alleviating poverty among the unemployed.
Performance and storage requirements of topology-conserving maps for robot manipulator control
(1989)
A new programming paradigm for the control of a robot manipulator by learning the mapping between the Cartesian space and the joint space (inverse Kinematic) is discussed. It is based on a Neural Network model of optimal mapping between two high-dimensional spaces by Kohonen. This paper describes the approach and presents the optimal mapping, based on the principle of maximal information gain. It is shown that Kohonens mapping in the 2-dimensional case is optimal in this sense. Furthermore, the principal control error made by the learned mapping is evaluated for the example of the commonly used PUMA robot, the trade-off between storage resources and positional error is discussed and an optimal position encoding resolution is proposed.
The structure of the compulsory pension system (CPS) in the Federal Republic of Germany has been changed fundamentally. The federal government has decided to introduce a private pension system on a voluntary basis. The payments to this voluntary system are to constitute a capital stock to supplement the payments of the compulsory pension system. Comprehensive fiscal subsidies will be introduced to support this change to the pension system. This paper discusses the special situation of families with children. The second section investigates the extent to which families with children were able to accumulate private wealth in the last ten years in Germany. In the third section the main features of the intended changes to the compulsory pension system are described, and an overview of the planned fiscal subsidies is provided. In the fourth and final section we attempt to evaluate the changes with particular attention to the situation of families.
This investigation of the wealth of private households as a possible indicator for the prosperity of a society indicated a strong increase in wealth for the Federal Republic of Germany since 1970. This applies both to the macro-economic results of the financial accounting of the Deutsche Bundesbank and to the micro-economic results of the Income and Consumption Surveys of the Federal Statistical Office. However, substantial differences become clear in the content expressed by these two different sets of data. While the financial accounting of the Deutsche Bundesbank shows an increase of net assets of around 808 per cent over 27 years (from 1.3 trillion DM in the year 1970 to 12.1 trillion DM in 1997), calculations on the basis of the Income and Consumption Surveys yield a corresponding value of only 280 per cent in a 25-year period, with a substantially lower overall magnitude in later investigations (from 2.2 trillion DM in 1973 to only 8.3 trillion DM in 1998). Investigation of the EVS data pointed out the great importance of property for the wealth situation of private households. However, not every household has property in the form of housing and real estate. In West Germany, ownership rates have increased substantially since 1962. However, since 1993 these rates have stagnated at about 50 per cent. The analysis of the distribution of wealth for West German households yielded a decline in the concentration of wealth in the period from 1973 to 1993, both in terms of the shares of total wealth held by individual quintiles of households, and as expressed by the Gini coefficients. However, this trend did not continue in the years between 1993 and 1998. For the year 1998 it can be determined that the lowest 40 per cent of households in West Germany had practically no wealth, while the highest quintile claimed over 60 per cent of total assets. For East Germany, strong tendencies are established toward adapting to the values in the West German Länder. This concerns first the absolute level of net assets, even though in 1998 these amounted to just 38 per cent of the analogous value in West German households, in terms of the average value per household. Similarly, the ownership rates of housing and real estate also rose dramatically after reunification. The inequality of the distribution of wealth in East Germany was reduced somewhat by this broader basis of real-estate ownership over the course of time, such that the Gini coefficient decreased slightly in the period from 1993 to 1998. However, it is also true for the new Länder in the Federal Republic that the lowest 40 per cent of households have practically no wealth, while the highest quintile of East German households claim over 70 per cent of total assets, even higher than its share in West Germany. Furthermore, the distribution of wealth is remarkably congruous in East and West Germany. Both the distribution of wealth as expressed by the quintile values and the results of the Gini coefficients yield similar results, whereby the trend in both regions is toward convergence. The similarity of these results must be regarded as nothing less than amazing, considering that the two regions followed different economic models for over forty years: the social free-market economy (Soziale Marktwirtschaft) in the Federal Republic of Germany, and the socialist planned economy (Sozialistische Planwirtschaft) in the German Democratic Republic.
The selection of features for classification, clustering and approximation is an important task in pattern recognition, data mining and soft computing. For real-valued features, this contribution shows how feature selection for a high number of features can be implemented using mutual in-formation. Especially, the common problem for mutual information computation of computing joint probabilities for many dimensions using only a few samples is treated by using the Rènyi mutual information of order two as computational base. For this, the Grassberger-Takens corre-lation integral is used which was developed for estimating probability densities in chaos theory. Additionally, an adaptive procedure for computing the hypercube size is introduced and for real world applications, the treatment of missing values is included. The computation procedure is accelerated by exploiting the ranking of the set of real feature values especially for the example of time series. As example, a small blackbox-glassbox example shows how the relevant features and their time lags are determined in the time series even if the input feature time series determine nonlinearly the output. A more realistic example from chemical industry shows that this enables a better ap-proximation of the input-output mapping than the best neural network approach developed for an international contest. By the computationally efficient implementation, mutual information becomes an attractive tool for feature selection even for a high number of real-valued features.
It is well known that artificial neural nets can be used as approximators of any continous functions to any desired degree. Nevertheless, for a given application and a given network architecture the non-trivial task rests to determine the necessary number of neurons and the necessary accuracy (number of bits) per weight for a satisfactory operation. In this paper the problem is treated by an information theoretic approach. The values for the weights and thresholds in the approximator network are determined analytically. Furthermore, the accuracy of the weights and the number of neurons are seen as general system parameters which determine the the maximal output information (i.e. the approximation error) by the absolute amount and the relative distribution of information contained in the network. A new principle of optimal information distribution is proposed and the conditions for the optimal system parameters are derived. For the simple, instructive example of a linear approximation of a non-linear, quadratic function, the principle of optimal information distribution gives the the optimal system parameters, i.e. the number of neurons and the different resolutions of the variables.
Towards correctness of program transformations through unification and critical pair computation
(2010)
Correctness of program transformations in extended lambda-calculi with a contextual semantics is usually based on reasoning about the operational semantics which is a rewrite semantics. A successful approach is the combination of a context lemma with the computation of overlaps between program transformations and the reduction rules, which results in so-called complete sets of diagrams. The method is similar to the computation of critical pairs for the completion of term rewriting systems. We explore cases where the computation of these overlaps can be done in a first order way by variants of critical pair computation that use unification algorithms. As a case study of an application we describe a finitary and decidable unification algorithm for the combination of the equational theory of left-commutativity modelling multi-sets, context variables and many-sorted unification. Sets of equations are restricted to be almost linear, i.e. every variable and context variable occurs at most once, where we allow one exception: variables of a sort without ground terms may occur several times. Every context variable must have an argument-sort in the free part of the signature. We also extend the unification algorithm by the treatment of binding-chains in let- and letrec-environments and by context-classes. This results in a unification algorithm that can be applied to all overlaps of normal-order reductions and transformations in an extended lambda calculus with letrec that we use as a case study.
Measuring confidence and uncertainty during the financial crisis : evidence from the CFS survey
(2010)
The CFS survey covers individual situations of banks and other companies of the financial sector during the financial crisis. This provides a rare possibility to analyze appraisals, expectations and forecast errors of the core sector of the recent turmoil. Following standard ways of aggregating individual survey data, we first present and introduce the CFS survey by comparing CFS indicators of confidence and predicted confidence to ifo and ZEW indicators. The major contribution is the analysis of several indicators of uncertainty. In addition to well established concepts, we introduce innovative measures based on the skewness of forecast errors and on the share of ‘no response’ replies. Results show that uncertainty indicators fit quite well with pattern of real and financial time series of the time period 2007 to 2010. Business Sentiment , Financial Crisis , Survey Indicator , Uncertainty
This paper provides theory as well as empirical results for pre-averaging estimators of the daily quadratic variation of asset prices. We derive jump robust inference for pre-averaging estimators, corresponding feasible central limit theorems and an explicit test on serial dependence in microstructure noise. Using transaction data of different stocks traded at the NYSE, we analyze the estimators’ sensitivity to the choice of the pre-averaging bandwidth and suggest an optimal interval length. Moreover, we investigate the dependence of pre-averaging based inference on the sampling scheme, the sampling frequency, microstructure noise properties as well as the occurrence of jumps. As a result of a detailed empirical study we provide guidance for optimal implementation of pre-averaging estimators and discuss potential pitfalls in practice. Quadratic Variation , MarketMicrostructure Noise , Pre-averaging , Sampling Schemes , Jumps
SUMMARY RECOMMENDATIONS 1. One of the major lessons from the current financial crisis refers to the systemic dimension of financial risk which had been almost completely neglected by bankers and supervisors in the pre-2007 years. 2. Accordingly, the most needed change in financial regulation, in order to avoid a repetition of such a crisis in the future, consists of influencing individual bank behaviour such that systemic risk is decreased. This objective is new and distinct from what Basle II was intended to achieve. 3. It is important, therefore, to evaluate proposed new regulatory instruments on the ground of whether or not they contribute to a reduction, or containment of systemic risk. We see two new regulatory measures of paramount importance: the introduction of a Systemic Risk Charge (SRC), and the implementation of a transparent bank resolution regime. Both measures complement each other, thus both have to be realized to be effective. 4. We propose a Systemic Risk Charge (SRC), a levy capturing the contribution of any individual bank to the overall systemic risk which is distinct from the institution’s own default risk. The SRC is set up such that the more systemic risk a bank contributes, the higher is the cost it has to bear. Therefore, the SRC serves to internalize the cost of systemic risk which, up to now, was borne by the taxpayer. 5. Major details of our SRC refer to the use of debt that may be converted into equity when systemic risk threatens the stability of the banking system. Also, the SRC raises some revenues for government. 6. The SRC has to be compared to several bank levies currently debated. The Financial Transaction Tax (FTT) does not directly address systemic risk and is therefore inferior to a SRC. Nevertheless, a FTT may offer the opportunity to subsidize on-exchange trading at the expense of off-exchange (over-the-counter, OTC) transactions, thereby enhancing financial market stability. The Financial Activity Tax (FAT) is similar to a VAT on financial services. It is the least adequate instrument among all instruments discussed above to limit systemic risk. 7. Bank resolution regime: No instrument to contain systemic risk can be effective unless the restructuring of bank debt, and the ensuing loss given default to creditors, is a real possibility. As the crisis has taught, bank restructuring is very difficult in light of contagion risk between major banks. We therefore need a regulatory procedure that allows winding down banks, even large banks, on short notice. Among other things, the procedure will require to distinguish systemically relevant exposures from those that are irrelevant. Only the former will be saved with government money, and it will then be the task of the supervisor to ensure a sufficient amount of nonsystemically relevant debt on the balance sheet of all banks. 8. Further issues discussed in this policy paper and its appendices refer to the necessity of a global level playing field, or the lack thereof, for these new regulatory measures; the convergence of our SRC proposal with what is expected to be long-term outcome of Basle III discussions; as well as the role of global imbalances.
Many studies show that most people are not financially literate and are unfamiliar with even the most basic economic concepts. However, the evidence on the determinants of economic literacy is scant. This paper uses international panel data on 55 countries from 1995 to 2008, merging indicators of economic literacy with a large set of macroeconomic and institutional variables. Results show that there is substantial heterogeneity of financial and economic competence across countries, and that human capital indicators (PISA test scores and college attendance) are positively correlated with economic literacy. Furthermore, inhabitants of countries with more generous social security systems are generally less literate, lending support to the hypothesis that the incentives to acquire economic literacy are related to the amount of resources available for private accumulation. JEL Classification: E2, D8, G1
This paper investigates the accuracy and heterogeneity of output growth and inflation forecasts during the current and the four preceding NBER-dated U.S. recessions. We generate forecasts from six different models of the U.S. economy and compare them to professional forecasts from the Federal Reserve’s Greenbook and the Survey of Professional Forecasters (SPF). The model parameters and model forecasts are derived from historical data vintages so as to ensure comparability to historical forecasts by professionals. The mean model forecast comes surprisingly close to the mean SPF and Greenbook forecasts in terms of accuracy even though the models only make use of a small number of data series. Model forecasts compare particularly well to professional forecasts at a horizon of three to four quarters and during recoveries. The extent of forecast heterogeneity is similar for model and professional forecasts but varies substantially over time. Thus, forecast heterogeneity constitutes a potentially important source of economic fluctuations. While the particular reasons for diversity in professional forecasts are not observable, the diversity in model forecasts can be traced to different modeling assumptions, information sets and parameter estimates. JEL Classification: G14, G15, G24
Price pressures
(2010)
We study price pressures in stock prices—price deviations from fundamental value due to a risk-averse intermediary supplying liquidity to asynchronously arriving investors. Empirically, twelve years of daily New York Stock Exchange intermediary data reveal economically large price pressures. A $100,000 inventory shock causes an average price pressure of 0.28% with a half-life of 0.92 days. Price pressure causes average transitory volatility in daily stock returns of 0.49%. Price pressure effects are substantially larger with longer durations in smaller stocks. Theoretically, in a simple dynamic inventory model the ‘representative’ intermediary uses price pressure to control risk through inventory mean reversion. She trades off the revenue loss due to price pressure against the price risk associated with remaining in a nonzero inventory state. The model’s closed-form solution identifies the intermediary’s relative risk aversion and the distribution of investors’ private values for trading from the observed time series patterns. These allow us to estimate the social costs—deviations from constrained Pareto efficiency—due to price pressure which average 0.35 basis points of the value traded. JEL Classification: G12, G14, D53, D61
This paper presents a model to analyze the consequences of competition in order-flow between a profit maximizing stock exchange and an alternative trading platform on the decisions concerning trading fees and listing requirements. Listing requirements, set by the exchange, provide public information on listed firms and contribute to a better liquidity on all trading venues. It is sometimes asserted that competition induces the exchange to lower its level of listing standards compared to a situation in which it is a monopolist, because the trading platform can free-ride on this regulatory activity and compete more aggressively on trading fees. The present analysis shows that this is not always true and depends on the existence and size of gains related to multi market trading. These gains relax competition on trading fees. The higher these gains are, the more the exchange can increase its revenue from listing and trading when it raises its listing standards. For large enough gains from multi-market trading, the exchange is not induced to lower the level of listing standards when a competing trading platform appears. As a second result, this analysis also reveals a cross - subsidization effect between the listing and the trading activity when listing is not competitive. This model yields implications about the fee structures on stock markets, the regulation of listings and the social optimality of competition for volume. JEL Classification: G10, G18, G12
This paper proposes the Shannon entropy as an appropriate one-dimensional measure of behavioural trading patterns in financial markets. The concept is applied to the illustrative example of algorithmic vs. non-algorithmic trading and empirical data from Deutsche Börse's electronic cash equity trading system, Xetra. The results reveal pronounced differences between algorithmic and non-algorithmic traders. In particular, trading patterns of algorithmic traders exhibit a medium degree of regularity while non-algorithmic trading tends towards either very regular or very irregular trading patterns. JEL Classification: C40, D0, G14, G15, G20
How ordinary consumers make complex economic decisions: financial literacy and retirement readiness
(2010)
This paper explores who is financially literate, whether people accurately perceive their own economic decision-making skills, and where these skills come from. Self-assessed and objective measures of financial literacy can be linked to consumers’ efforts to plan for retirement in the American Life Panel, and causal relationships with retirement planning examined by exploiting information about respondent financial knowledge acquired in school. Results show that those with more advanced financial knowledge are those more likely to be retirement-ready.
We examined financial literacy among the young using the most recent wave of the 1997 National Longitudinal Survey of Youth. We showed that financial literacy is low; fewer than one-third of young adults possess basic knowledge of interest rates, inflation, and risk diversification. Financial literacy was strongly related to sociodemographic characteristics and family financial sophistication. Specifically, a college-educated male whose parents had stocks and retirement savings was about 45 percentage points more likely to know about risk diversification than a female with less than a high school education whose parents were not wealthy. These findings have implications for consumer policy. JEL Classification: D91
This paper investigates the accuracy and heterogeneity of output growth and inflation forecasts during the current and the four preceding NBER-dated U.S. recessions. We generate forecasts from six different models of the U.S. economy and compare them to professional forecasts from the Federal Reserve’s Greenbook and the Survey of Professional Forecasters (SPF). The model parameters and model forecasts are derived from historical data vintages so as to ensure comparability to historical forecasts by professionals. The mean model forecast comes surprisingly close to the mean SPF and Greenbook forecasts in terms of accuracy even though the models only make use of a small number of data series. Model forecasts compare particularly well to professional forecasts at a horizon of three to four quarters and during recoveries. The extent of forecast heterogeneity is similar for model and professional forecasts but varies substantially over time. Thus, forecast heterogeneity constitutes a potentially important source of economic fluctuations. While the particular reasons for diversity in professional forecasts are not observable, the diversity in model forecasts can be traced to different modeling assumptions, information sets and parameter estimates. JEL Classification: C53, D84, E31, E32, E37 Keywords: Forecasting, Business Cycles, Heterogeneous Beliefs, Forecast Distribution, Model Uncertainty, Bayesian Estimation
This paper analyzes loan pricing when there is multiple banking and borrower distress. Using a unique data set on SME lending collected from major German banks, we can instrument for effective coordination between lenders, carrying out a panel estimation. The analysis allows to distinguish between rents that accrue due to single bank lending, rents that accrue due to relationship lending, and rents that accrue due to the elimination of competition among multiple lenders. We find the relationship lending to have no discernible impact on loan spreads, while both single lending and coordinated multiple lending significantly increase the spread. Thus, contrary to predictions in the literature, multiple lending does not insure the borrower against hold-up. JEL Classification: D74, G21, G33, G34
This paper shows the equivalence of applicative similarity and contextual approximation, and hence also of bisimilarity and contextual equivalence, in the deterministic call-by-need lambda calculus with letrec. Bisimilarity simplifies equivalence proofs in the calculus and opens a way for more convenient correctness proofs for program transformations. Although this property may be a natural one to expect, to the best of our knowledge, this paper is the first one providing a proof. The proof technique is to transfer the contextual approximation into Abramsky's lazy lambda calculus by a fully abstract and surjective translation. This also shows that the natural embedding of Abramsky's lazy lambda calculus into the call-by-need lambda calculus with letrec is an isomorphism between the respective term-models.We show that the equivalence property proven in this paper transfers to a call-by-need letrec calculus developed by Ariola and Felleisen.
This note shows that in non-deterministic extended lambda calculi with letrec, the tool of applicative (bi)simulation is in general not usable for contextual equivalence, by giving a counterexample adapted from data flow analysis. It also shown that there is a flaw in a lemma and a theorem concerning finite simulation in a conference paper by the first two authors.
A logical framework consisting of a polymorphic call-by-value functional language and a first-order logic on the values is presented, which is a reconstruction of the logic of the verification system VeriFun. The reconstruction uses contextual semantics to define the logical value of equations. It equates undefinedness and non-termination, which is a standard semantical approach. The main results of this paper are: Meta-theorems about the globality of several classes of theorems in the logic, and proofs of global correctness of transformations and deduction rules. The deduction rules of VeriFun are globally correct if rules depending on termination are appropriately formulated. The reconstruction also gives hints on generalizations of the VeriFun framework: reasoning on nonterminating expressions and functions, mutual recursive functions and abstractions in the data values, and formulas with arbitrary quantifier prefix could be allowed.
Over the past few decades, changes in market conditions such as globalisation and deregulation of financial markets as well as product innovation and technical advancements have induced financial institutions to expand their business activities beyond their traditional boundaries and to engage in cross-sectoral operations. As combining different sectoral businesses offers opportunities for operational synergies and diversification benefits, financial groups comprising banks, insurance undertakings and/or investment firms, usually referred to as financial conglomerates, have rapidly emerged, providing a wide range of services and products in distinct financial sectors and oftentimes in different geographic locations. In the European Union (EU), financial conglomerates have become part of the biggest and most active financial market participants in recent years. Financial conglomerates generally pose new problems for financial authorities as they can raise new risks and exacerbate existing ones. In particular, their cross-sectoral business activities can involve prudentially substantial risks such as the risk of regulatory arbitrage and contagion risk arising from intra-group transactions. Moreover, the generally large size of financial conglomerates as well as the high complexity and interconnectedness of their corporate structures and risk exposures can entail substantial systemic risk and can therefore threaten the stability of the financial system as a whole. Until a few years ago, there was no supervisory framework in place which addressed a financial conglomerate in its entirety as a group. Instead, each group entity within a financial conglomerate was subject to the supervisory rules of its pertinent sector only. Such silo supervisory approach had the drawback of not taking account of risks which arise or aggravate at the group level. It also failed to consider how the risks from different business lines within the group interrelate with each other and affect the group as a whole. In order to address this lack of group-wide prudential supervision of financial conglomerates, the European legislator adopted the Financial Conglomerates Directive 2002/87/EC8 (‘FCD’) on 16 December 2002. The FCD was transposed into national law in the member states of the EU (‘Member States’) by 11 August 2004 for application to financial years beginning on 1 January 2005 and after. The FCD primarily aims at supplementing the existing sectoral directives to address the additional risks of concentration, contagion and complexity presented by financial conglomerates. It therefore provides for a supervisory framework which is applicable in addition to the sectoral supervision. Most importantly, the FCD has introduced additional capital requirements at the conglomerate level so as to prevent the multiple use of the same capital by different group entities. This paper seeks to examine to what extent the FCD provides for an adequate capital regulation of financial conglomerates in the EU while taking into account the underlying sectoral capital requirements and the inherent risks associated with financial conglomerates. In Part 1, the definition and the basic corporate models of financial conglomerates will be presented (I), followed by an illustration of the core motives behind the phenomenon of financial conglomeration (II) and an overview of the development of the supervision over financial conglomerates in the EU (III). Part 2 begins with a brief elaboration on the role of regulatory capital (I) and gives a general overview of the EU capital requirements applicable to banks and insurance undertakings respectively. A delineation of the commonalities and differences of the banking and the insurance capital requirements will be provided (II). It continues to further examine the need for a group-wide capital regulation of financial conglomerates and analyses the adequacy of the FCD capital requirements. In this context, the technical advice rendered by the Joint Committee on Financial Conglomerates (JCFC) as well as the currently ongoing legislative reforms at the EU level will be discussed (III). The paper finally closes with a conclusion and an outlook on remaining open issues (IV).
This study examines the legal environment of netting agreements covering financial contracts. It concludes that an international instrument should be developed capable of improving the effectiveness of netting agreements in mitigating systemic risk. To this end, two different aspects of the enforceability of netting agreements are considered: (i) the general enforceability of netting, and (ii) the possibility of precluding the operation of netting a mechanism by way of a regulatory moratorium for considerations of systemic stability. The first part of the study presents the use of netting and the various forms it may take before going on to explain the benefits and drawbacks of enforceable netting agreements. Benefits for individual firms consist in lower counterparty risk and more favourable capital requirements. Benefits for the financial market as a whole flow from greater financial market stability since the contagion of systemically relevant institutions by the default or insolvency of another institution is limited, thus helping to avoid systemic effects. Additionally, the use of netting arrangements can improve overall market liquidity. A potential drawback of enforceability of netting, in certain situations, is that the operation of a netting mechanism could actually work against the purpose of systemic stability where the transfer of parts of the business of an insolvent financial institution to a solvent bridge entity would enhance or maintain value to a greater extent than the operation of a netting agreement would. Regulatory authorities are considering under which conditions a moratorium to halt the netting mechanism until the situation is solved could avoid this threat to systemic stability. The second part of the study examines whether there is the potential to support the purpose of enhanced systemic stability by way of international harmonisation of private and insolvency law. As regards the issue of general enforceability, the global picture of netting legislation is heterogeneous. Given the great practical relevance of the matter, an international instrument could be very useful. As to the issue of private law consequences of regulatory moratoria, the absence of a harmonised framework appears to lead to actual cross-border inconsistency and legal uncertainty as regards financial contracts that are governed by a foreign law. Taking these to aspects into account, this paper recommends that work on developing an international instrument be undertaken. The final part of the study suggests a set of preliminary guidelines for the development of suchan instrument. In the light of the findings of the previous sections, a mixed, two-step approach is recommended. First, a non-binding instrument could be developed, serving as a benchmark and reservoir of legal solutions in respect of the relevant issues. Secondly, isolated aspects relating to both the general enforceability of netting and the accommodation of a regulatory moratorium in foreign private and insolvency law could be dealt with in an international Convention, in particular where cross-border situations involving netting require uniformity of applicable legal rules.