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Der Band untersucht die Ursachen, Ausprägungen und Reaktionen auf die Entstehung bzw. Erstarkung populistischer Parteien und Bewegungen in Deutschland und Ostmitteleuropa.
Inhaltsverzeichnis:
Arthur Benz: Populismus als Herausforderung für Wissenschaft und Praxis - Einleitung
Dirk Jörke: Populismus – Ursachen und falsche Antworten
Michael Edinger: Mobilisierung gegen das Establishment. Zu einem Wesensmerkmal populistischer Strömungen
Claudia Landwehr und Nils D. Steiner: Populismus – eine Nachfrageperspektive
Joachim Klose: Ein Land, zwei Perspektiven? Zum Populismusin Ost- und Westdeutschland
Petra Guasti und Lenka Buštíková: Populismus in Ostmitteleuropa und der Verzicht auf Politik
Portfolio choice and estimation risk : a comparison of Bayesian approaches to resampled efficiency
(2002)
Estimation risk is known to have a huge impact on mean/variance (MV) optimized portfolios, which is one of the primary reasons to make standard Markowitz optimization unfeasible in practice. Several approaches to incorporate estimation risk into portfolio selection are suggested in the earlier literature. These papers regularly discuss heuristic approaches (e.g., placing restrictions on portfolio weights) and Bayesian estimators. Among the Bayesian class of estimators, we will focus in this paper on the Bayes/Stein estimator developed by Jorion (1985, 1986), which is probably the most popular estimator. We will show that optimal portfolios based on the Bayes/Stein estimator correspond to portfolios on the original mean-variance efficient frontier with a higher risk aversion. We quantify this increase in risk aversion. Furthermore, we review a relatively new approach introduced by Michaud (1998), resampling efficiency. Michaud argues that the limitations of MV efficiency in practice generally derive from a lack of statistical understanding of MV optimization. He advocates a statistical view of MV optimization that leads to new procedures that can reduce estimation risk. Resampling efficiency has been contrasted to standard Markowitz portfolios until now, but not to other approaches which explicitly incorporate estimation risk. This paper attempts to fill this gap. Optimal portfolios based on the Bayes/Stein estimator and resampling efficiency are compared in an empirical out-of-sample study in terms of their Sharpe ratio and in terms of stochastic dominance.
Several recent studies have addressed household participation in the stock market, but relatively few have focused on household stock trading behavior. Household trading is important for the stock market, as households own more than 40% of the NYSE capitalization directly and can also influence trading patterns of institutional investors by adjusting their indirect stock holdings. Existing studies based on administrative data offer conflicting results. Discount brokerage data show excessive trading to the detriment of stockholders, while data on retirement accounts indicate extreme inactivity. This paper uses data representative of the population to document the extent of household portfolio inertia and to link it to household characteristics and to stock market movements. We document considerable portfolio inertia, as regards both changing stockholding participation status and trading stocks, and find that specific household characteristics contribute to the tendency to exhibit such inertia. Although our findings suggest some dependence of trading directly-held equity through brokerage accounts on the performance of the stock market index, they do not indicate that the recent expansion in the stockholder base and the experience of the stock market downswing have significantly altered the overall propensity of households to trade in stocks or to switch participation status in a way that could contribute to stock market instability. JEL Classification: G110, E210
Assumptions about the dynamic and distributional behavior of risk factors are crucial for the construction of optimal portfolios and for risk assessment. Although asset returns are generally characterized by conditionally varying volatilities and fat tails, the normal distribution with constant variance continues to be the standard framework in portfolio management. Here we propose a practical approach to portfolio selection. It takes both the conditionally varying volatility and the fat-tailedness of risk factors explicitly into account, while retaining analytical tractability and ease of implementation. An application to a portfolio of nine German DAX stocks illustrates that the model is strongly favored by the data and that it is practically implementable. Klassifizierung: C13, C32, G11, G14, G18
An important assumption underlying the designation of some insurers as systemically important is that their overlapping portfolio holdings can result in common selling. We measure the overlap in holdings using cosine similarity, and show that insurers with more similar portfolios have larger subsequent common sales. This relationship can be magnified for some insurers when they are regulatory capital constrained or markets are under stress. When faced with an exogenous liquidity shock, insurers with greater portfolio similarity have even larger common sales that impact prices. Our measure can be used by regulators to predict which institutions may contribute most to financial instability through the asset liquidation channel of risk transmission.
Real options theory applies techniques known from finance theory to the valuation of capital investments. The present paper investigates further into this analogy, considering the case of a portfolio of real options. An implementation of real option models in practice will mostly be concerned with a portfolio of real options, so the analysis of portfolio aspects is of both academic and practical interest. Is a portfolio of real options special? In order to shed some light on this question, the present paper will outline the relevant features of a portfolio of real options. It will show that the analogy to financial options remains great if compound option models are applied. As a result, a portfolio of real options, and therefore the firm as such, generally is to be understood as one single compound, real option.
In this study I want to show, above all, that the linguistic expression of POSSESSION is not a given but represents a problem to be solved by the human mind. We must recognize from the outset that linguistic POSSESSION presupposes conceptual or notional POSSESSION, and I shall say more about the latter in Chapter 3. Certain varieties of linguistic structures in the particular languages are united by the fact that they serve the common purpose of expressing notional POS SESSION. But this cannot be their sole common denominator. How would we otherwise be able to recognize, to understand, to learn and to translate a particular linguistic structure as representing POSSESSION? There must be a properly linguistic common denominator, an invariant, that makes this possible. The invariant must be present both within a particular language and in cross-language comparison. What is the nature of such an invariant? As I intend to show, it consists in operational programs and functional principles corresponding to the purpose of expressing notional POSSESSION. The structures of possessivity which we find in the languages of the world represent the traces of these operations, and from the traces it becomes possible to reconstruct stepwise the operations and functions.
Possession im Dakota
(1985)
Zweck dieser Arbeit ist die Darstellung der sprachlichen Mittel, derer sich das Dakota zum Ausdruck von Possessiv-Relationen bedient. Dem Hauptteil geht eine in die Thematik einführende Charakterisierung der untersuchten Sprache sowie eine Betrachtung des sprachtheoretischen Hintergrundes voraus. Eine systematisierende Zusammenfassung der relevanten Daten bildet den Abschluß der Arbeit. Mangels Belegstellen konnten allerdings nicht alle Fragen, die sich aus der Auseinandersetzung mit der Materie ergaben, restlos geklärt werden. Die Beispiele stammen großenteils aus Mythen; sofern sie nicht mit Quellenangaben versehen sind, sind sie von der Verfasserin konstruiert.
Possessive constructions are grammatical constructions which contain two nominals and express that the referent of one of these nominals belongs to the other. The kind of relationship denoted by possessive constructions is not only that of ownership (1), as the term "possessive" might suggest, but also that of kinship (2), bodypart relationship (3), part/whole relationship (4) and similar relationships [...]. The following investigation will start with possessive constructions on phrase level, i.e. possessive phrases, and then deal with possessive constructions on clause level.
The basic question is whether POSSESSOR and POSSESSUM are on the same level as the roles of VALENCE, two additional roles as it were. My research on POSSESSION has shown (Seiler 1981:7 ff.) that this is not the case, that there is a difference in principle between POSSESSION and VALENCE. However, there are multiple interactions between the two domains, and these interactions shall constitute the object of the following inquiry. It is hoped that this will contribute to a better understanding both of POSSESSION and of VALENCE.