Most professional economists believe that economists in general are more selfish than other people and that this increased selfishness is due to economics education. This article offers empirical evidence against this widely held belief. Using a unique data set about giving behavior in...

Framing a decision situation differently has affected behavior substantially in previous studies. This paper tests a framing effect in a field experiment at the University of Zurich. Each semester, every student has to decide whether to contribute to two social funds. Students were randomly...

People behave pro-socially in a wide variety of situations that standard economic theory is unable to explain. Social comparison is one explanation for such pro-social behavior: people contribute if others contribute or cooperate as well. This paper tests social comparison in a field experiment...

This paper explores how wealth and inequality can affect self-governed solutions to commons dilemmas by constraining group cooperation. It reports a series of experiments in the field where subjects are actual commons users. Household data about the participants-context explain statistically the...

Models of job tournaments and competitive workplaces more generally predict that while individual effort may increase as competition intensifies between workers, the incentive for workers to cooperate with each other diminishes. We report on a field experiment conducted with workers from a...

Explaining the evolution and maintenance of cooperation among unrelated individuals is one of the fundamental problems in biology and the social sciences. Recent experimental evidence suggests that altruistic punishment is an important mechanism to maintain cooperation among humans. In this...