Gender is rarely included as a factor in economic models. However, recent work in experimental economics, as well as in psychology and political science, suggests that gender is an important determinant of economic and strategic behavior. Gender differences in bargaining are examined using the trust game introduced by Joyce Berg et al. (1995). In this two-person game, the proposer is given a choice of sending some, all, or none of his or her $10 experimental payment to an anonymous partner, the responder. For US subjects, Berg et al. found that 30 of 32 proposers deviated from economic equilibrium and sent some money to their partners. In sending money, proposers are trusting that their partners will return some money to them. In addition, 24 out of 32 of responders who received money returned some. Gender differences in this game are discussed.