We investigate how group boundaries, and the economic environment surrounding groups, affect altruistic cooperation and … punishment behavior. Our study uses experiments conducted with 525 officers in the Swiss Army, and exploits random assignment to … harm those who defect, encouraging a norm of cooperation towards the group. Adding competition between groups causes even …

determinants of norm enforcement. -- norm enforcement ; social norms ; field experiment ; altruistic punishment ; cooperation …Extensive evidence from laboratory experiments indicates that many individuals are willing to use costly punishment to … behavior in the field. We study the propensity to punish norm violators in a natural field experiment conducted in the main …

prevalent at a very young age. However, direct and indirect reciprocity treatments do not increase overall cooperation rates, as …Understanding the roots of human cooperation among strangers is of great importance for solving pressing social … dilemmas and maintening public goods in human societies. We study the development of cooperation in 929 young children, aged 3 …

a prisoner's dilemma game affects behavior and leads to discrimination. Running a framed field experiment with 828 six …- to eleven-year old primary school children in the city of Meran, we find that cooperation generally increases with age …, but that the gap between cooperation among in-group members and cooperation towards children speaking another language is …

the impacts of monetary gift exchange and of expressions of respect on salespersons' reciprocity when purchasing doner … salespersons exhibit positive reciprocity in response both to a monetary gift and to compliments regarding the product. The …

We study in a sample of 1,070 primary school children, aged seven to eleven years, how altruism in a donation … experiment is related to children’s risk attitudes and intertemporal choices. Examining such a relationship is motivated by … theories of reciprocal altruism that provide a cornerstone for understanding human social behavior. We find that higher risk …

and consider information. In an online experiment, where about 2,300 participants choose between two compiled charity …