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 …

considers the roles that altruism and reciprocity might play in cooperatives, and it discusses the recent, largely experimental …

We study the impact of altruism on the stability of international climate agreements. We consider the standard two … stage and abatement levels are chosen at the second stage. We modify the game to consider altruism in the participation … types of altruism: impartial altruism, where countries show a concern for all other countries, and community altruism, where …

cooperation may be less than additive. Using a utility function embodying both reciprocity and altruism we show that unconditional … altruism attenuates the punishment motive and thus may reduce the level of punishment inflicted on defectors, resulting in … lower levels of contribution. Increases in altruism may also reduce the level of benefits from the public project net of …