influences of altruism and bravery in the evolution of heroism. Our study found that females do prefer risk-prone brave males to … factor influencing female choice of short-term partners, long-term partners, and male friends, with altruism playing a lesser … part in their choice. Altruism was deemed important in long-term relationships and friendships, but for short-term liaisons …

altruism, and (3) the possibility of sustained mutual cooperation in finitely repeated social dilemmas is affected by the …

across individuals. In the research reported here, we examine two models of heterogeneous utility, linear-altruism and …

We analyze the role of 'the' utility discount rate and its implications to generation-specific and societal altruism … have to be distinguished: An (inverse) altruism-parameter and a social discount rate. High levels of the altruism … well as altruism-models and, additionally, the altruism-parameter has to be infinitely high. This shows clearly that the …

. Parental and spousal transfers are motivated both by altruism and by a desire to use the transfers to impart specific values or … behaviors to the recipient. When altruistic transfers predominate and the altruism is not completely reciprocated by the …