-Stay-Lose-Shift, are not prevalent. We also find that the strategies used to support cooperation change with the parameters of the game …

Human cooperation, occurring without reciprocation and between unrelated individuals in large populations, represents … evidence for lower cooperation (i) when exposed to social information about peer cooperation levels than without such … observed cooperation was more likely to be caused by participants' general propensity to cooperate than by the effect of social …

We examine the effect of payoff variations on cooperation in one-shot prisoner's dilemma games. We focus on three … impact on cooperation. Temptation directly deters cooperation and indirectly harms cooperation by lowering beliefs about the … opponent's cooperativeness. Efficiency indirectly affects cooperation through beliefs, but the magnitude of the effect is …

Case studies of cartels and recent theory suggest that repeated communication is key for stable cooperation in … understood. We study cooperation under different monitoring and communication structures in the laboratory. Under all monitoring … monitoring, where actions can only be observed with noise, cooperation is stable only when subjects can communicate before every …

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 …