Tipping is a phenomenon that illustrates the importance of social norms and psychological reasons in motivating economic behavior. People tip because this is the social norm and disobeying norms results in psychological disutility. Tipping is also economically important: in the United States...

The paper presents a model of the evolution of social norms. When a norm is costly to follow and people do not derive benefits from following it except for avoiding social disapproval, the norm erodes over time. Tip percentages, however, increased over the years, suggesting that people derive...

Tipping is an important phenomenon, both because of its economic magnitude and because of the insights it suggests about economic behavior in general. It is closely related to several areas in economics, including labor economics, industrial organization, social economics, behavioral economics,...

Some economists believe that social norms are created to improve welfare where the market fails. I show that tipping is such a norm, using a model in which a waiter chooses service quality and then a customer chooses the tip. The customer’s utility depends on the social norm about tipping and...