I argue in favor of a competitive screening approach for studying the question of coalition formation in exchange economies under asymmetric information. I obtain a new notion of core that refines Wilson (1978)'s coarse core. It is nonempty under the standard regularity conditions. I also...

This paper is concerned with the dynamics of competition in American political campaigns, in particular with how the type of message a candidate sends is affected by the stage of the campaign, the status of the candidate, and the competitiveness of the race. The paper examines the allocation of...

The phenomenon of "choice shifts" in group decision-making is fairly ubiquitous in the social psychology literature. Faced with a choice between a ``safe" and ``risky" decision, group members appear to move to one extreme or the other, relative to the choices each member might have made on her...