Explicit and implicit incentives and opportunities for mutually beneficial voluntary cooperation co-exist in many … crowding out of voluntary cooperation even after incentives have been abolished. This crowding out occurs also in repeated … voluntary cooperation while exposed to incentives. Overall, our findings show that the behavioral consequences of explicit …

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 …

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

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 …

mediated by differences in cognitive skills. Our design uses a Repeated Prisoner's Dilemma, and we compare rates of cooperation … higher cooperation rates and profits than in separated groups (with consistent gains among lower IQ subjects and relatively … evolutionary game theory model, where higher IQ among subjects determines - through better working memory - a lower frequency of …

Existing research supports two opposing mechanisms through which positive mood might affect cooperation. Some studies … have suggested that positive mood produces more altruistic, open and helpful behavior, fostering cooperation. However … reduced use of information, hampering cooperation. We find evidence that suggests the second hypothesis dominates when playing …

key to the quick emergence of an efficient culture of universal cooperation because the more prosocial subjects populate … social norm of high cooperation. This norm appears to guide subjects' cooperation and punishment choices, including the …