cost-benefit ratio (CBR). There are indeed only two stable sets of equilibria enabling cooperation, one for low CBRs …-order discriminators which highlights the necessity for higher-order information to sustain cooperation through indirect reciprocity. In a …

A novel version of a Voluntary Contribution Mechanism game tests how player cooperation responds to changes in … incentives, i.e., payoffs that depend on performance relative to different reference groups. Cooperation is greatest when players …

, and explains the degree of cooperation by a combination of five motives: the size of gains from cooperation, expectations …

find support for risk dominance of TFT as a determinant of cooperation. This comment introduces the "Payback" strategy … explain the observed cooperation patterns …

In a world in which many pressing global issues require large scale cooperation, understanding the group size effect on … realistic scenario in which the natural output limits of the public good imply that the benefit of cooperation increases fast …, group size has a curvilinear effect on cooperation, according to which intermediate-size groups cooperate more than smaller …

difference in cooperation rates increases as the subjects gain experience with the game. As a result, sophisticates earn more … than naifs, when paired with players of their own type. This finding implies that cooperation in the game is not a result …

affiliations are unknown. We find no differences in cooperation across groups that are able to punish free-riding behavior. Thus …

find that the subjects sustain cooperation in every treatment, but that their strategies differ substantially in the three …