One of the key scientific challenges is the puzzle of human cooperation. Why do people cooperate? Why do people help strangers, even sometimes at a major cost to themselves? Why do people want to punish people who violate norms and undermine collective interests? This book is inspired by the...

We investigate experimentally whether the extent of conditional cooperation in public good games depends on the marginal per capita return (MPCR) to the public good and type of game. The MPCR is varied from 0.2 to 0.4 to 0.8. The "standard" game, in which three players contribute before a...

We report the results of an experiment designed to test if individuals are more dishonest when using a smartphone, desktop computer or pen and paper. We explore this in both a setting where dishonesty benefits another (mutual-gain), and one where it harms another (zero-sum). We find that...

We explore whether individuals are averse to telling a Pareto white lie-a lie that benefits both themselves and another. We first review and summarize the existing evidence on Pareto white lies. We find that the evidence is relatively limited and varied in its conclusions. We then present new...

A long line of research has addressed whether there are sex differences in cooperation and other forms of prosocial behavior. Studies of social dilemmas (situations that pose a conflict between individual and collective interests) have yielded particularly contradictory conclusions about whether...