Why should you help a competitor? Why should you contribute to the public good if free
riders reap the benefits of your generosity? Cooperation in a competitive world is a …

Artificial intelligence (AI) is starting to pervade the economic and social life. This renders
strategic interactions between humans and artificial agents more and more common. At the …

An indispensable survey of new developments and results in experimental economics When
The Handbook of Experimental Economics first came out in 1995, the notion of economists …

A growing experimental literature studies the determinants of cooperation in infinitely
repeated games, tests different predictions of the theory, and suggests an empirical solution …

In the finitely repeated prisoner's dilemma, it is well known that defection in every game is
the unique dominant-strategy Nash equilibrium. This follows from the familiar backward …

This paper uses two laboratory experiments to investigate the effects of contracts on
interpersonal trust. We predict that the use of binding contracts to promote or mandate …

Experimental economists currently lack a convention for how to pay subjects in experiments
with multiple tasks. We provide a theoretical framework for analyzing this question …

While there is an extensive literature on the theory of infinitely repeated games, empirical
evidence on how “the shadow of the future” affects behavior is scarce and inconclusive. I …

A usual criticism of the theory of infinitely repeated games is that it does not provide sharp
predictions since there may be a multiplicity of equilibria. To address this issue, we present …

We conducted online field experiments in large real-world social networks in order to
decompose prosocial giving into three components:(1) baseline altruism toward randomly …