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 …

's common restrictions on the curvature of the decision-makers utility function can dramatically bias the altruism parameter. We … show that this is particularly problematic when comparing altruism between groups with well-documented differences in risk …