Substantial research with adult populations has found that selfish impulses are less likely to be pursued when decisions are publicly observable. To the best of our knowledge, however, this behavioral regularity has not been systematically explored as potential solution to social dilemmas. This...

Substantial research with adult populations has found that selfish impulses are less likely to be pursued when decisions are publicly observable. To the best of our knowledge, however, this behavioral regularity has not been systematically explored as potential solution to social dilemmas. This...

We report experimental evidence from a 3-person Dictator Game in which dictators decide over the distribution of probabilities of winning a fixed, indivisible, monetary prize. This evidence is compared with (i) a control treatment in which money is perfectly divisible and dictators allocate...

A simple variant of trait group selection, employing predators as the mechanism underlying group selection, supports contingent reproductive suicide as altruism (i.e., behavior lowering personal fitness while augmenting that of another) without kin assortment. The contingent suicidal type may...