In this thesis it is analyzed if promoting product market competition can help to to fight unemployment in Europe. We have used a general equilibrium model in order to study how reducing mark-ups and increasing productivity in one sector affect aggregate unemployment for an exogenously given...

Die vorliegende Dissertation besteht aus fünf unabhängigen Forschungspapieren über optimale Steuer- und Bildungspolitik, welche ich während meines Promotionsstudiums an der Universität Konstanz erstellt habe. Private Versicherungen gegen Einkommensrisiko können aufgrund von moral hazard...

We analyze determinants of regional industry mix and focus especially on the influence of labor market characteristics. By combining a labor market pooling argument with an argument involving the cost of switching a worker from one firm to another, we show that in the presence of product market...

Octopus exports are an important source of foreign exchange for Mauritania. The export market has historically been dominated by coordinated Japanese buyers, a situation that led Mauritania to create the Societe Mauritanienne de Commercialisation de Poisson (SMCP) to negotiate with buyers and...

This paper identifies market and commodity characteristics that seem to support successful cooperative bargaining in markets for farm output. Bargaining is not just about increasing prices paid to farmers; indeed, although there is very little empirical research that addresses the issue, what...

This paper examines the interdependence between imperfect competition and emis-sions trading in a two-sector (clean and dirty) economy. We compare the welfare implica-tions of an absolute cap-and-trade scheme (permit trading) with a relative intensity-basedscheme (credit trading). We nd...

It is known that overlapping generations models with imperfectly competitive firms may exhibit a continuum of stationary equilibria. The reason of this indeterminacy is that different price expectation functions of consumers lead to different objective demand functions against which firms...

We show that equilibrium involuntary unemployment emerges in a multi-stage game model where all market power resides with firms, on both the labour and the output market. Firms decide wages, employment, output and prices, and under constant returns there exists a continuum of subgame perfect...

In a sector in which oligopolistic firms face a sector-specific labour supply constraint, there may be no marketclearing wage. Instead, at some wages, there can be two equilibria, one with involuntary unemployment and one with unfilled vacancies.

We consider a multi-sector overlapping generations model with oligopolistic firms in the output markets and wage-setting trade unions in the labour markets. A coordination problem between firms creates multiple temporary equilibria which are either Walrasian or of the Keynesian unemployment...