norms. In recent years, there has been substantial progress, however, on how cooperation norms are enforced. Here we review … insights into the proximate and ultimate forces behind human cooperation. …

of those gains. Incentive contracting in these environments does not crowd-out off- equilibrium cooperation, and at high … incentive levels cooperation is crowded in. …

cooperation and coordination within teams. Using artificial agents, different social contests are created, as training …

The Coasean way to deal with the cooperation failure that is implicit in Pareto inefficiency is to remove or lessen the … obstacles to cooperation through the attribution of property rights and the elimination or reduction of transaction costs. The … enhance the opportunities for cooperation through voluntary agreements involving private and public parties. Thus the extent …

hypothesize that egalitarian distribution norms and cooperation norms apply in our experiments, and that third parties, whose … punishment increased the more the norm was violated. Likewise, up to roughly 60% of the third parties punished violations of the … cooperation norm. Thus, our results show that the notion of strong reciprocity extends to the sanctioning behavior of ‘‘unaffected …

group when antisocial behavior is observed. In many circumstances, however, we can not allow for punishment and exclude the … possibility of counter-punishment occurring. We design a public goods experiment based on Fehr and Gaechter (2000) where we allow … for both punishment and counter-punishment. We find that in both Partner and Stranger treatments average contributions …