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 a multi-billion-dollar phenomenon that challenges the traditional assumption of selfish economic agents who have no feelings and do not care about social norms. This article reviews the early history of tipping and offers an economic analysis of different aspects of tipping. Using the...