Understanding the roots of human cooperation among strangers is of great importance for solving pressing social … dilemmas and maintening public goods in human societies. We study the development of cooperation in 929 young children, aged 3 … to 6. In a unified experimental framework, we examine which of three fundamental pillars of human cooperation – direct …

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. …

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 …

There is continuing debate about what explains cooperation and self-sacrifice in nature and in particular in humans …

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 …

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 …

Intelligence affects social outcomes of groups. A systematic study of the link is provided in an experiment where two … 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 …

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

We investigate whether there is a link between conditional cooperation and betrayal aversion. We use a public goods …

's material payoff structure affects cooperation is incomplete. In this paper we investigate the effect of variation in material … payoffs on cooperation, focusing on one-shot PD games where efficiency requires mutual cooperation. We report results from … three experiments (N = 1,993): in a preliminary experiment, we vary the payoffs over a large range. In our first main …