Location-specific norms of behavior are a widespread phenomenon. In the case of medical practice, numerous studies have found that geographic location exerts a strong influence on the choice of treatments and procedures. This paper shows how the presence of social influence on treatment...

We develop a model of contracting in which individual effort choices are subject to social pressure to conform to the average effort level of others in the same risk-sharing group. As in related models of social interactions, a change in exogenous variables or contract terms generates a social...

For finite games in strategic form it is shown that, in a Nash equlibrium, every player uses a strategy which is computable. However, there can exist no algorithm which is guaranteed to find an equilibrium for every instance of a game with computable payoffs. In contrast, an e-equilibrium is...