Economic and hypothetical dictator game experiments: Incentive effects at the individual level

The paper compares behavior in economic dictator game experiments played with actual money (amounts given by "dictator" subjects) with behavior in hypothetical dictator game experiments where subjects indicate what they would give, although no money is actually exchanged. The average amounts transferred in the two experiments are remarkably similar. We uncover meaningful individual differences in real and hypothetical allocations and demonstrate the importance of two personality traits - agreeableness and extraversion - in reconciling them. We conclude that extraverts are "all talk;" agreeable subjects are "for real".