This contribution provides a brief overview and discussion of the role of experiments in economics. It is argued that economic experiments have convinced economists and the public of the existence of phenomena that have been outside the scope of economics. The success of these experiments is...

In a model with private information of the worker about her ability and unobservable effort choice, the role of public and private employment services is analyzed. The coexistence of an inefficient employment exchange and an efficient private agency may lead to optimal screening with first best...

Nicht alle Güter werden über einen Preismechanismus auf Märkten gehandelt. Angebot und Nachfrage von Plätzen an Schulen und Universitäten, die Zuweisung von Organen bei Lebendspendern und die Partnerwahl vollziehen sich nach anderen Regeln. Wie diese Regeln gestaltet sein müssen, um zu...