economics. This paper explores voting on a scheme of intergroup competition which facilitates cooperation in a social dilemma … situation. Experimental results show that the competitive scheme fosters cooperation. Competition is popular but also that the …

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 …

competing. Third, seniors are typically more cooperative than juniors in a team-production game. Cooperation is highest in …

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

behavior over time and across situations. We tackle this task with an experiment and a structural model of preferences that …

Intelligence affects social outcomes of groups. A systematic study of the link is provided in an experiment where two … 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 …