We study cooperation within and between groups in the laboratory, comparing treatments in which two groups have … conflict. We model conflict using an inter-group Tullock contest, and measure its effects upon cooperation using a multi …-level public good game. We demonstrate that conflict increases cooperation within groups, while decreasing cooperation between …

We show in a public goods experiment on three continents that conditional cooperation is a universal behavioral … regularity. Yet, the number of conditional cooperators and the extent of conditional cooperation are much higher in the U ….S.A. than anywhere else. -- conditional cooperation ; public goods ; experiment …

Previous experiments have found a moderate, positive effect of group size on cooperation in voluntary contribution … results from n-person prisoner's dilemma and oligopoly experiments where group size has a negative effect on cooperation. In … mechanism ; cooperation ; group size …

We investigate experimentally whether the extent of conditional cooperation in public good games depends on the … conditional cooperation. We also find no evidence that the type of game makes a difference to unconditional contributions. The …

We study cooperation within and between groups in the laboratory, comparing treatments in which two groups have … conflict. We model conflict using an inter-group Tullock contest, and measure its effects upon cooperation using a multi …-level public good game. We demonstrate that conflict increases cooperation within groups, while decreasing cooperation between …

cooperation. The strongest increase is clearly evident when subjects interact with members of different identities, which is …

drive cooperation down over time, and it decreases efficiency by almost 50% compared to the benchmark. This pattern is not …