Theorists and policy analysts have convincingly argued that greater trust makes a more efficient society by eliminating costly contracts or expensive reputations. Concurrently, experiments suggest that reciprocity is a potent substitute for law when compliance with contracts is imperfectly...

Theorists and policy analysts have convincingly argued that greater trust makes a more efficient society by eliminating costly contracts or expensive reputations. Concurrently, experiments suggest that reciprocity is a potent substitute for law when compliance with contracts is imperfectly...

Trust is a crucial component of social capital. We use an experimental moonlighting game with a representative sample of the U.S. population, oversampling immigrants, to study trust, positive, and negative reciprocity between first-generation immigrants and native-born Americans as a measure of...

The 1/n problem potentially limits the effectiveness of profit sharing in motivating workers. While the economic literature suggests that reciprocity can mitigate this problem, it remains silent on the optimal degree of reciprocity. We present a representative model demonstrating that...

Human groups maintain a high level of sociality despite a low level of relatedness among group members. The behavioral basis of this sociality remains in doubt. This paper reviews the evidence for an empirically identifiable form of prosocial behavior in humans, which we call "strong...