. In the model agents receive heterogeneous utility from pure and impure altruism (Andreoni 1989) that permits warm glow to … vary between monetary donations and volunteering, thus allowing preferences for impure altruism to rationalize inefficient … allocation decisions. We define a measure of the price of impure altruism as the additional proportion of income sacrificed by a …

We study with a sample of 1,070 primary school children, aged seven to eleven years, how altruism in a donation … theories of reciprocal altruism that provide a cornerstone to understand human social behavior. We find that higher risk …-linear. We confirm earlier results that altruism increases with age during childhood and that girls are more altruistic than boys …