A common feature of the literature on the evolution of preferencesis that evolution favors nonmaterialistic preferences only if preferencetypes are observable at least to some degree. We argue that this resultis due to the assumption that in each state of the evolutionary dynam-ics some Bayesian...

Actual behaviour is inuenced in important ways by moral emotions,for instance guilt or shame (see among others Tangney et al., 2007). Belief-dependant models of social preferences using the framework of psycho-logical games aim to consider such emotions to explain other-regardingbehaviour. Our...

Recent research has cast some doubt on the general validity of outcome-basedmodels of social preferences. We develop a model based on cognitive dissonance thatfocuses on the importance of self-image. An experiment (a dictator game variant)tests the model.First, we nd that subjects whose choices...