People Playing Games : The Human Face of Experimental Economics (Presidential Address)

Experiments can be used not only to test theory but also to measure preferences and assess heterogeneity of behavior. I discuss the design of experimental measures of ahruism and trust, as well as their uses in assessing how behavior varies across individuals, and across partners that a given individual might encounter. Experiments show that women are more altruistic than men. The appearance of a partner substantially impacts trust and trustworthiness, in part through the association of attractiveness and skin tone with expectations about a partner's behavior