Often information structures are such that while individual reputation building is impossible groups of agents would have the possibility of building up a reputation. We experimentally examine whether groups of sellers in markets that suffer from moral hazard are able to build up reputations...

Studying evolutionarily successful behavior we show in a general framework that when individuals maximizing payoff differentials invest resources in punishing others. Interestingly, these investments are increasing in individuals, own wealth and decreasing in the wealth of others.

The findings on the ultimatum game are considered as belonging to the most robust experimental results. In this paper we present a slightly altered version of the mini ultimatum game of Bolton and Zwick (1995). Whereas in the latter exactly equal splits were feasible in our games these were...