equally altruistic siblings, their equilibrium effort is non-monotonic in the common degree of altruism, and it depends on the … harshness of the environment. We define a notion of local evolutionary stability of degrees of sibling altruism, and show that …

, from a Humean point of view, of a welfare policy which would aim at promoting the highest individual happiness whereas … individual decisions, like individual happiness, are determined not only by allocations of goods, but also by an emotional state …

-run prevalence of family altruism in the population. That evolutionary effect questions the desirability of the LTC public provision … altruistic and non-altruistic agents, and where the transmission of (non) altruism takes place through a socialization process à …

degree of short-term impatience, and the degrees of family and non family altruism. Short-term impatience and non family … altruism are found no to affect wealth but, contrarily to recent results of behavioural analysis, the three other parameters … with the degree of family altruism (wealth intended for bequests). The way preferences are measured allows to get rid of …

First, we present what is called the Theory of Psychological Preferences (altruism, rational reciprocity...) through … collective impact of altruism, social loyalty, intrinsic reciprocity and so forth . …

We provide the first theoretical analysis of altruism in networks. Agents are embedded in a fixed, weighted network and …