Gender differences in altruism and the price of altruism: evidence from restaurant tips

This paper examines gender differences in altruism using restaurant tipping data. More specifically, we investigate how male and female customer percentage tips vary as the price of altruism (bill size) varies and find that females tip more than males when altruism is cheap, males tip more than females when altruism is expensive, and that females are more responsive to the price of altruism.