cooperation in a partner setting. We systematically vary a group's composition from all individuals being partner over blended … composition does not affect cooperation in the subsequent partner setting with one exception: Groups cooperate significantly less …

temporary contract, while others are permanent members of the same team. In a laboratory experiment we analyze the cooperation … permanents. We argue that social identity is affected by team composition and the individuals' role in a team. …

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

temporary contract, while others are permanent members of the same team. In a laboratory experiment we analyze the cooperation … permanents. We argue that social identity is affected by team composition and the individuals' role in a team. …