Type structures are a simple device to describe higher-order beliefs. But how can we check whether two types generate the same belief hierarchy? This paper generalizes the concept of a type morphism and shows that one type structure is contained in another if and only if the former can be mapped...

Theories about unique equilibrium selection are often rejected in experimental investigations. We drop the idea of selecting a single prominent equilibrium but suggest the coexistence of different beliefs about "appropriate" equilibrium or non-equilibrium play. Our main selection criterion is...

In Binary Threshold Public Good (BTPG) games n players contribute or not to the production of a public good which is produced if and only if there are at least k contributors. The BTPG games with the highest (k=n) and the lowest (k=1) threshold are the Stag Hunt game and the Volunteer's Dilemma....

I consider a flexible framework of strategic interactions under incomplete information in which, prior to committing their actions (consumption, production, or investment decisions), agents choose the attention to allocate to an arbitrarily large number of information sources about the primitive...

We study nonlinear income taxation in a Roy model in which agents' productivity is sectorspecific. We show that when income taxes can be sector-specific, the Diamond-Mirrlees theorem (according to which the second-best displays production efficiency) fails: social welfare (be it Rawlsian or...

We study a theoretical general equilibrium environment in which the only activity of interest is armed robbery. Agents choose whether to be citizens or robbers, and whether to purchase handguns. Armed citizens can protect themselves from robbery but any armed agent runs the risk of accidentally...

Mechanisms where intermediaries charge a commission fee and have the sellers set the price are widely used in practice e.g. by real estate agents, stock brokers, art galleries, or auction houses. We model competition between intermediaries in a dynamic random matching model, where in every...

Since campaign finance reform is usually motivated by the concern that existing legislation can not effectively prevent campaign contributions to 'buy favors', this paper assumes that contributions influence political decisions. But, given that it is also widely recognized that interest groups...

We examine the incentives of an interest group to provide verifiable policy-relevant information to a political decision-maker and to exert political pressure on her. We show that both lobbying instruments are interdependent. In our view information provision is a risky attempt to affect the...

We study an in.nitely-repeated .rst-price auction with common values. Initially, bid-ders receive independent private signals about the objects. value, which itself does not change over time. Learning occurs only through observation of the bids. Under one-sided incomplete information, this...