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 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 study cooperation within and between groups in the laboratory, comparing treatments in which two groups have …

present results from a laboratory experiment in which two parties can appropriate resources via a contest or, alternatively …, take an outside option. Keeping monetary gains expected from fighting constant across all treatments, the experiment … compares conflict choices of players in two-against-two, one-against-one, and two-against-one settings. Overall, we find …

temporary group member's effort but also the efforts of the permanent group members and, ultimately, also cooperation within the …