The paper addresses the following question: How efficient is the market system in allocating resources if trade takes place at some prices p that are not necessarily competitive? Even though there are many partial answers to this question, an answer that stands comparison to the rigor by which...

In this paper, we study a pure exchange economy with idiosyncratic uncertainty, hidden action and multiple consumption goods. We consider two different market structures: contingent markets on the one hand, and financial and spot markets on the other hand. We propose a competitive equilibrium...

Im Großen und Ganzen sind die Sozialversicherungen zukunftsfähig aufgestellt; gleichwohl besteht weiterer Handlungsbedarf. Mit der Agenda 2010 und dem Wechsel von einem Defined Benefit- auf ein Defined Contribution-System hat die Regierung Schröder den ersten, mit der Schuldenregel, der...

We develop a dynamic model of political competition. Each party has a policymotivated ideological wing and an office-motivated opportunistic wing. A blockade arises if inner-party conflict stops policy implementation. We use this model to study whether early elections should be used to overcome...

We develop a dynamic model of political competition. Each party has a policymotivated ideological wing and an office-motivated opportunistic wing. A blockade arises if inner-party conflict stops policy implementation. We use this model to study whether early elections should be used to overcome...

This paper analyzes the welfare effects of a public smoking ban in bars. We construct a model that captures crucial features of bar life: competing bars, social interaction, and heterogenous preferences for a smoking ban. Smokers and non-smokers simultaneously choose a bar given their...

We develop a dynamic model of political competition. Each party has a policymotivated ideological wing and an office-motivated opportunistic wing. A blockade arises if inner-party conflict stops policy implementation. We use this model to study whether early elections should be used to overcome...

We develop a dynamic model of political competition. Each party has a policymotivated ideological wing and an office-motivated opportunistic wing. A blockade arises if inner-party conflict stops policy implementation. We use this model to study whether early elections should be used to overcome...

This paper analyzes the welfare effects of a public smoking ban in bars. We construct a model that captures crucial features of bar life: competing bars, social interaction, and heterogenous preferences for a smoking ban. Smokers and non-smokers simultaneously choose a bar given their...