We show in a public goods experiment on three continents that conditional cooperation is a universal behavioral regularity. Yet, the number of conditional cooperators and the extent of conditional cooperation are much higher in the U.S.A. than anywhere else.

We report the results of a field experiment with bicycle messengers in Switzerland and the United States. Messenger work is individualized enough that firms can choose to condition pay on it, but significant externalities in messenger behavior nonetheless give their on-the-job interactions the...

It is standardly assumed that individuals react to perceived unfairness or norm violations in precisely the same area or relationship where the original offense has occurred. However, grievances over being exposed to injustice may have even broader consequences and also spill over to other...

It is standardly assumed that individuals adjust to perceived unfairness or norm violations in precisely the same area or relationship where the original offense has occurred. However, grievances over being exposed to injustice may have even broader consequences and also spill over to other...