This paper provides a direct test of the hypothesis that agents' objective functions are non-separable in economic incentives and social preferences. We study experimentally fixed-prize contests using a 2x2 design, varying orthogonally the degree of competition of the incentive mechanism...

This paper presents the results of a survey-based experiment on the role of equity and efficiency for altruistic behavior. Using simple binary decisions for a representative pool of subjects, we find that both equity and efficiency are relevant for the decision to give. However, contrary to the...