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 …

and the socioeconomic background of parents play a vital role in the early development of human cooperation. …Understanding the roots of human cooperation among strangers is of great importance for solving pressing social … dilemmas and maintening public goods in human societies. We study the development of cooperation in 929 young children, aged 3 …

beliefs of the appropriation decisions of others. -- common-pool resources ; asymmetry ; cooperation ; laboratory experiments …