question, we use the reunification of Germany as a natural experiment and study the post-reunification trajectory of … interpreted as evidence for the passing of cultural traits across generations and for cooperation being sustained by values rather …

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 …

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 …

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 … difference is absent. Cooperation of higher intelligence subjects is payoff sensitive, thus not automatic: in a treatment with …

from over 40 countries: individual exposure to war violence tends to increase social cooperation at the local level … societies, it appears to leave a positive legacy in terms of local cooperation and civic engagement. We discuss, synthesize and …

temporary contract, while others are permanent members of the same team. In a laboratory experiment we analyze the cooperation …

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 …

possibly preferences that are closer to those of Democrats. We interpret these results as evidence that cooperation is mostly …

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 …

BoS, with high and low payoff inequality. In PD, disclosure markedly hampers cooperation, as higher intelligence players …