refutes the self-interest hypothesis, suggesting that concerns for altruism, fairness, and reciprocity strongly motivate many …

Reciprocity is one of the main basic social relations that constitute societies. It consists of being favourable to … fact proper reciprocity). Reciprocity extends to important cases of aids inducing aids that are not strictly reciprocal. It … in questions of development. The theory of reciprocity shows and compares the various types of solutions of the …

Altruism can be understood in a behavioral or in a psychological sense. Motivationally, altruism is the desire to … enhance the welfare of others at a net welfare loss to oneself. Behaviorally, altruism is any act that could have resulted … on seeing what other agents are doing, corresponding to quasi-moral norms of fairness or reciprocity, and acts whose …

Altruism, giving and pro-social conduct, and reciprocity, are the basis of the existence and performance of societies … (which they sometimes also create); and in charity and specific organizations. Altruism has various origins: it can be … hedonistic or natural altruism in empathy, affection, sympathy, emotional contagion, pity, and compassion; or normative altruism …

majority coalition can be stable, provided that reciprocity is sufficiently strong and widespread. In addition, a stable … minority coalition can exist, even with weak reciprocity preferences. This latter coalition is weakly larger than the maximum …