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In the standard New Keynesian sticky price model the central bank faces no contradiction between the stabilization of inflation and the stabilization of the welfare relevant output gap after a productivity shock hits the economy. When the standard model is enhanced by real wage rigidities or labor turnover costs, an endogenous short-run inflation-output tradeoff arises. This paper compares the implications of the two labor market rigidities. It argues that economists and policymakers alike should pay more attention to labor turnover costs for the following reasons. First, a model with labor turnover costs generates impulse response functions that are more in line with the empirical evidence than those of a model with real wage rigidities. Second, labor turnover costs are the dominant source for the inflation-output tradeoff when both rigidities are present in the model. And finally, there is stronger empirical evidence for the existence of labor turnover costs than for real wage rigidities.

The thesis analyzes monetary and labor policies under different market frictions. In the first part several versions of a microfounded dynamic general equilibrium model with monopolistic competitors in the product and/or labor market are derived and simulated. First of all, the monetary persistence of a pure price staggering economy is compared to a pure wage staggering economy under different labor market structures (by means of a newly proposed persistence measure) and interactions are explored. Secondly, the thesis simulates the effects of real wage rigidities in a disinflation experiment non-linearly. Thereby, caveats of the conventionally used log-linearization are shown. The second part of the thesis develops a dynamic microfounded labor market framework with insider wage bargaining, labor turnovers costs and tax distortions. The calibrated model is used in order to analyze different labor market policies. The addressed questions include the labor market development in East Germany after unification, the existence of unemployment traps, their influence on labor market persistence and policy effectiveness, and the optimal targeting of employment subsidies in terms of their employment, equity and welfare implications.

The thesis analyzes monetary and labor policies under different market frictions. In the first part several versions of a microfounded dynamic general equilibrium model with monopolistic competitors in the product and/or labor market are derived and simulated. First of all, the monetary persistence of a pure price staggering economy is compared to a pure wage staggering economy under different labor market structures (by means of a newly proposed persistence measure) and interactions are explored. Secondly, the thesis simulates the effects of real wage rigidities in a disinflation experiment non-linearly. Thereby, caveats of the conventionally used log-linearization are shown. The second part of the thesis develops a dynamic microfounded labor market framework with insider wage bargaining, labor turnovers costs and tax distortions. The calibrated model is used in order to analyze different labor market policies. The addressed questions include the labor market development in East Germany after unification, the existence of unemployment traps, their influence on labor market persistence and policy effectiveness, and the optimal targeting of employment subsidies in terms of their employment, equity and welfare implications.

"We analyze the effects of labor market institutions (LMIs) on inflation and output volatility. The eurozone offers an unprecedented experiment for this exercise: since 1999, no national monetary policies have been implemented that could account for volatility differences. We use a New Keynesian model with unemployment to predict the effects of LMIs. In our empirical estimations, we find that higher labor turnover costs have a significant negative effect on output volatility, while replacement rates have a positive effect, both in line with theory. While LMIs have a large effect on output volatility, they do not matter much for inflation volatility." (Author's abstract, IAB-Doku) ((en))

This paper analyzes the effects of different labor market institutions on inflation and output volatility. The eurozone offers an unprecedented experiment for this exercise: since 1999, no national monetary policies have been implemented that could account for volatility differences across member states, but labor market characteristics have remained very diverse. We use a New Keynesian model with unemployment to predict the effects of different labor market institutions on macroeconomic volatilities. In our subsequent empirical estimations, we find that higher labor turnover costs have a statistically significant negative effect on output volatility, while replacement rates have a positive effect, both of which are in line with theory. Real wage rigidities do not seem to play much of a role. This result is in line with our employed labor market model, but stands in stark contrast to the search and matching model. While labor market institutions have a large effect on output volatility, they do not seem to have much of an effect on inflation volatility. Our estimations indicate that the latter is driven instead to a certain extent by differences in government spending volatility.

Based on a quarterly regulatory dataset for German banks from 1999 to 2004, this paper analyzes the effects of banks' regulatory capital on the transmission of monetary policy in a system of liquidity networks. The dynamic panel regression results provide evidence in favour of the bank capital channel theory. Banks holding less regulatory capital and less interbank liquidity react more restrictively to a monetary tightening than their peers.

This paper analyzes the cost of disinflation under real wage rigidities in a micro-founded New Keynesian model. Unlike Blanchard and Galí (2007) who carried out a similar analysis in a linearized framework, we take non-linearities into account. We show that the results change dramatically, both qualitatively and quantitatively, for the steady states and for the dynamic adjustment paths. In particular, a disinflation implies a prolonged slump without any need for real wage rigidities.

This paper analyzes the cost of disinflations under real wage rigidities in a micro-founded New Keynesian model. The consensus is that real wage rigidities can be a useful mechanism to induce the inflation persistence that is absent in the standard Calvo model. Real wage rigidities thus generate a slump in output after a credible disinflationary policy. This consensus is flawed, since it depends on analyzing the model in a linearized framework. Once nonlinearities are taken into account, the results change dramatically, both qualitatively and quantitatively. Real wage rigidities imply neither inflation persistence, nor output costs of disinflations. Real wage rigidities actually create a boom after a permanent reduction in the inflation target of the monetary policy. -- Disinflation ; sticky prices ; real wage rigidities ; nonlinearities