A large-scale economic experiment, conducted on a representative sample of the US population, shows that cooperation creates special moral obligations. Participants in the experiment, acting as impartial spectators, transferred significantly more money to an unlucky worker when two individuals...

The meritocratic fairness ideal implies that inequalities in earnings are regarded as fair only when they reflect differences in performance. Consequently, implementation of the meritocratic fairness ideal requires complete information about individual performances, but in practice, such...