We investigate how group boundaries, and the economic environment surrounding groups, affect altruistic cooperation and … harm those who defect, encouraging a norm of cooperation towards the group. Adding competition between groups causes even … stronger in-group cooperation, but also a qualitative change in punishment: punishment becomes anti-social, harming cooperative …

higher effort with respect to cooperation and cooperation does not increase effort with respect to the baseline. However …

higher effort with respect to cooperation and cooperation does not increase effort with respect to the baseline. However … ; incentives ; competition ; cooperation …

higher effort with respect to cooperation and cooperation does not increase effort with respect to the baseline. However …

higher effort with respect to cooperation and cooperation does not increase effort with respect to the baseline. However …

competing. Third, seniors are typically more cooperative than juniors in a team-production game. Cooperation is highest in …

different amounts of competition on-the-job and that these differences explain differences in cooperation in our experiment …, perceptions of competition faced on-the-job and the treatment effect of job incentives explain these differences in cooperation to …

different amounts of competition on-the-job and that these differences explain differences in cooperation in our experiment …, perceptions of competition faced on-the-job and the treatment effect of job incentives explain these differences in cooperation to … a large extent. -- field experiment ; cooperation ; social disapproval ; social preference ; competition ; Japan …