Trust games are employed to investigate the effect of heterogeneity in income and race on cooperation in South Africa …

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 anti-social, harming cooperative …

This paper introduces a two-sided methodological framework for studies on cooperation based on a new game design … decision problem. Decision makers can choose an individual level of cooperation from a given range of possible actions. Within … applying our framework. Palestinians show a substantially higher cooperation level in the positive externality treatment. In …

We test if cooperation is promoted by rank-order competition between groups in which all groups can be ranked first, i … are absent if groups perform at the same level and it therefore does not eliminate low-cooperation equilibria. We find … that all-can-win competition produces a universal increase in cooperation and benefits a majority of individuals if …

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 …

measurement device for cooperation that can be easily understood by children. There is some evidence of more cooperation in Sweden …. Girls are in general more cooperative with boys than with girls. Relating cooperation to competitiveness, this appears to be …

This paper experimentally examines how religious festivals and the degree of religiosity affect cooperation and … religious festivals other than the normal daily prayers. The overall results show no differences in cooperation or altruistic … differences in beliefs about others contributions. By and large, this indicates the importance of conditional cooperation. …