information on reciprocity types, implementability of an incentive-compatible social choice function is guaranteed if it satises … an additional insurance property. By contrast, precise information on reciprocity types may imply that all ecient social … agents have private information about their material payo types and their reciprocity types. We also provide a systematic …

Games that appear to be independent, involving none of the same players, may be related by emotions of reciprocity … Kirchsteiger’s model of sequential reciprocity (Games Econ Behav 47(2):268–298, 2004) to groups of individuals and define a new … “sequential group reciprocity equilibrium” for which we prove its existence. We study the case of two games with two players in …

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