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This dissertation contains five independent chapters dealing with wage dispersion and unemployment. The first chapter deals with the explanation of international changes in wage inequality and unemployment in the 80s and 90s. Both theoretically and empirically, social benefits and its link to average income are blamed for the different experiences across countries. The second chapter discusses the search framework, to explain residual wage inequality and finds that institutional wage compression has ambiguous effects on employment. In the third chapter, we apply the theory to German data. We show that job-to-job transitions are important in explaining both frictions and career advances. In the fourth chapter, we empirically assess the relationship between wage dispersion and unemployment for homogeneous workers. We find that neither a frictional nor a neo-classical view in explaining this relationship are convincing. Unemployment within cells is not negatively correlated with wage dispersion. Finally, the last chapter builds a theoretical model which treats heterogeneous individuals in a production function framework and a frictional labor market. The model generates both wage dispersion within and between skill groups and both frictional and structural unemployment. In sum, the dissertation stresses the importance of modelling frictions to understand different types of wage inequality and unemployment.
Trotz zunehmend positiver Meldungen vom deutschen Arbeitsmarkt, die von einer "Entspannung der Lage" bis hin zu einer "Trendwende" reichen, herrscht eine anhaltend hohe Arbeitslosigkeit unter den wettbewerbsschwachen Arbeitsuchenden. Ein genauer Blick auf die aktuellen Zahlen verrät, dass der Anteil der Langzeitarbeitslosen an der Gesamtarbeitslosenzahl 42 % beträgt. Wiederum besitzt die Hälfte der arbeitslos gemeldeten Arbeitslosengeld II-Empfänger keine abgeschlossene Berufsausbildung, knapp ein Viertel keinen Schulabschluss. ...
The dissertation collects four self-contained essays which contribute to the literature on wage structures, heterogeneous labor demand, and the impact of trade unions. The first paper provides a detailed description of the evolution of wage inequality in East and West Germany in the late years of the twentieth century. In contrast to previous decades, wage inequality has been rising in several dimensions during that period. The second paper identifies cohort effects in the evolution of both wages and employment. Observed structures are consistent with a labor demand framework that incorporates steady skill-biased technical change. Substitutability between skill and age groups in the German labor market is found to be relatively high. Simulations based on estimated elasticities of substitution illustrate that higher wage dispersion between skill groups would have contributed to a reduction in unemployment. The third paper estimates determinants of individual union membership decisions and studies the erosion of union density in East and West Germany. Using corresponding predictions of net union density, the fourth paper analyzes the link between union strength and the structure of wages. A higher union density is associated with lower residual wage dispersion, reduced skill wage differentials, and a lower wage level. This finding is in line with an insurance motive for union action. The thesis comprises the following articles: (1) “Rising Wage Dispersion, After All! The German Wage Structure at the Turn of the Century,” IZA Discussion Paper 2098, April 2006. (2) “Skill Wage Premia, Employment, and Cohort Effects: Are Workers in Germany All of the Same Type?”, IZA Discussion Paper 2185, June 2006, joint with Bernd Fitzenberger. (3) “The Erosion of Union Membership in Germany: Determinants, Densities, Decompositions,” IZA Discussion Paper 2193, July 2006, joint with Bernd Fitzenberger and Qingwei Wang. (4) “Equal Pay for Equal Work? On Union Power and the Structure of Wages in West Germany, 1985–1997,” translation of “Gleicher Lohn für gleiche Arbeit? Zum Zusammenhang zwischen Gewerkschaftsmitgliedschaft und Lohnstruktur in Westdeutschland 1985–1997,” Zeitschrift für Arbeitsmarkt-Forschung, 38 (2/3), 125-146, joint with Bernd Fitzenberger, 2005.