In empirischen und theoretischen Untersuchungen wird die Rolle von Verträgen für das Zustandekommen von ökonomischen Transaktionen auf Arbeitsmärkten betont. Da die Investitionstätigkeit in Sach- und Humankapital sowie in Forschung und Entwicklung häufig spezifisch erfolgt, ist es...

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...

The Maschler-Perles solution is the unique bargaining solution which is superadditive and satisfies the usual covariance properties. We provide two proofs for superadditivity that do not rely on the standard traveling time.

A cephoid is an algebraic ("Minkowski") sum of finitely many prisms in R^n. A cephoidal game is an NTU game the feasible sets of which are cephoids. We provide a version of the Shapley NTU value for such games based on the bargaining solution of Maschler-Perles.

Existing theoretical literature fails to explain satisfactorily the differences between the pay of workers that are covered by collective agreements and others who are not. This study aims at providing a model framework which is amenable for an analysis of this issue. Our general-equilibrium...

It is given a brief overview over the experimental results in ultimatum games with complete and incomplete information, especially considering fairness. Following theories which model different fairness considerations are presented. The main part extends the Double Auction model by the inequity...

Diese Arbeit betrachtet menschliches Verhalten auf elektronischen M?rkten. In diesem Zusammenhang wurden zwei Experimente durchgef?hrt, die das Auction Fever in Holl?ndischen Auktionen sowie das menschliche Risikoverhalten im sehr hohen Wahrscheinlichkeitsbereich n?her untersuchen. Im Experiment...

We consider misconceptions about the functioning of the economy as one possible explanation for the emergence of crises in democracies. Furthermore, we study a political process which may lead to successful reform. First of all, we show that voters can make inefficient decisions concerning...