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 …

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 …

This paper introduces new experimental designs to enrich understanding of conditional cooperation and punishment in … method. It is found that the selfish bias in conditional cooperation is made significantly worse when other players …

Development of human societies requires cooperation among unrelated individuals and obedience to social norms. Although … punishment is widely agreed to be potentially useful in fostering cooperation, many recent results in psychology and economics … eliminate its detrimental effects on cooperation. In a public goods game designed to create tension between group and individual …

We investigate whether there is a link between conditional cooperation and betrayal aversion. We use a public goods …

cooperation than male students …

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 …

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

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 …