norms. In recent years, there has been substantial progress, however, on how cooperation norms are enforced. Here we review … insights into the proximate and ultimate forces behind human cooperation. …

training reverse that effect and promote cooperation? We conducted an experiment to answer this question. We found that … students who had the ethics module had higher rates of cooperation than students without the ethics module, even after … controlling for communication and other factors expected to affect cooperation. We conclude that the teaching of ethics can …

Peru. In our experiment, subjects revealed their risk preferences with a series of choices between two gambles. We added a …

Previous tests of the endowment effect have usually observed WTA-WTP disparities. Here, a public good experiment is …

population size of each region. The experiment shows that centralization induces lower tax morale and less efficient outcomes …

We explore the role of reciprocity in wage determination by combining experimental and survey data. The experiment is … reciprocity and individual wages. However, the direction of causality is unclear. Various aspects of the distribution of the … reciprocity have a positive effect on wages, while the spread in the distribution (standard deviation) has a strong significant …

behavior. We propose that religious rituals promote in-group trust and cooperation that help to overcome collective …-action problems. We test this hypothesis on communal societies for whom mutual cooperation is a matter of survival. We design field …

societies, the Israeli kibbutz. The facts that kibbutz members have voluntarily chosen their lifestyle of cooperation and … cooperation when paired with anonymous kibbutz members than when paired with city residents. In fact, when paired with city … residents, kibbutz members’ observed levels of cooperation are identical to those displayed by the city residents. Moreover, we …