initial cooperation rates are similar, it increases in the groups with higher intelligence to reach almost full cooperation … differences in the response to past cooperation of the partner. In higher intelligence subjects, cooperation after the initial … difference is absent. Cooperation of higher intelligence subjects is payoff sensitive, thus not automatic: in a treatment with …

We use skin conductance responses and self-reports of hedonic valence to study the emotional basis of cooperation and …. The application of sanctions activates a "virtuous emotional circle" that accompanies cooperation. Emotionally aroused … punished, and increase their subsequent level of cooperation. The outcome is an increased level of contribution that becomes …

We experimentally examine how the incentive to defect in a social dilemma affects conditional cooperation. In our first … conditional cooperation is higher when the own gain from defecting is lower and when the loss imposed on the first mover from … role of social preferences in conditional cooperation …

We investigate how group boundaries, and the economic environment surrounding groups, affect altruistic cooperation and … harm those who defect, encouraging a norm of cooperation towards the group. Adding competition between groups causes even … stronger in-group cooperation, but also a qualitative change in punishment: punishment becomes antisocial, harming cooperative …

beliefs with experience are central to understanding behavior and learning in the IRPD. Beliefs strongly predict cooperation …

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

's material payoff structure affects cooperation is incomplete. In this paper we investigate the effect of variation in material … payoffs on cooperation, focussing on one-shot PD games where efficiency requires mutual cooperation. Following Mengel (2018 … defectors and co-operators respectively, while an index of efficiency captures the gains from cooperation. We conduct two …

and its impact on cooperation of its members are yet not well understood. We experimentally investigate community choice …