This paper presents a formal theory of reciprocity. Reciprocity means that people reward kind actions and punish unkind …

affects negative reciprocity in identityhomogeneous and -heterogeneous groups has received only little attention. Consequently … negative reciprocity. To test our hypotheses we employ one-shot public good games in strategy method with induced social … impact on reciprocity, improving economists ability to predict behavior taking emotions also into consideration. …

without doubt that direct and indirect reciprocity are important determinants of successful cooperation. We also discuss the … influences strong reciprocity. Our results show that culture has a strong influence on positive and in especially negative strong … reciprocity. In particular, we find large crosscultural differences in 'antisocial punishment' of pro-social co-operators. Further …

contributions are strictly dominant for the strong player. -- Experiments ; Leadership ; Reciprocity ; Voluntary Contribution …