We analyse a first-price auction where risk-averse bidders bid for an object whose value is risky. Using a private values setting, we provide the first analysis of the pure comparative statics of risk in auctions. We show that as risk increases, decreasingly risk-averse bidders will reduce their...

The aim of this paper is to provide empirically testable predictions regarding the relationship between market size and concentration. In the first part of the paper, a model of endogenous horizontal mergers is investigated. It is shown that concentrated outcomes can not be supported in a free...

In repeated games with imperfect public monitoring, players can use public signals to coordinate their behavior perfectly, and thus support cooperative outcomes with the threat of punishments. But with even a small amount of private monitoring, players' private histories may lead them to have...