find that members of each ethnicity show favoritism towards those of their own ethnicity in both trust and cooperation and … that communication enhances inter-ethnic cooperation significantly. We also find that Uyghur and Han subjects behave …

equilibrium strategy. Exclusion has a positive impact on cooperation when it is followed by a quick rather than a slow … retaliation. Post-exclusion cooperation and forgiveness depend not only on the length of exclusion but also on the perceived …

cooperation systems that differ both in their level of in-group favoritism and in the tools that they employ to enforce … cooperation regimes. This paper uses an anthropological measure of the tightness of historical kinship systems to study the … structure of cooperation patterns and enforcement devices across historical ethnicities, contemporary countries, ethnicities …

from one continuation probability to the other. When switching from large to small, transient higher levels of cooperation … are observed in the early games of the small continuation set. Conversely, when switching from small to large, cooperation … probabilities. These asymmetries suggest a bias in favor of cooperation. Finally, we examine the link between altruism and RPD play …

goods provision - the quick emergence of a widely accepted social cooperation norm that demands high contributions but - in … consensus as well as the high cooperation demands required by the norm break down. However, when peer punishment is possible … cooperation and welfare - the opportunity to form a social norm unambiguously causes high public good contributions and group …

of universal cooperation because the more prosocial subjects populate the two efficient institutions first, elect … prosocial judges (if institutionally possible), and immediately establish a social norm of high cooperation. This norm appears … to guide subjects' cooperation and punishment choices, including the virtually complete removal of antisocial punishment …