We experimentally investigate the nature of cooperation in various repeated games, with subjects from Romania and USA …. We find stark cross-country differences in the propensity to sustain multilateral cooperation through bilateral rewards …

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. -- conditional cooperation ; public goods ; experiment …