The shadow of the future: 5-Year-olds, but not 3-year-olds, adjust their sharing in anticipation of reciprocation

R: A Language and Environment for Statistical Computing

R Core Team · 2000 · 353K citations · Full text

Natural Sciences, Computer Science, Statistical Computing +10

The Evolution of Cooperation

Robert Axelrod, W D Hamilton · Science · 1981 · 20.3K citations

Life Sciences, Biology, Evolutionary Biology +17

The Norm of Reciprocity: A Preliminary Statement

Alvin W. Gouldner · American Sociological Review · 1960 · 11.8K citations

Social Sciences, Philosophy, Social Psychology +7

Social evaluation by preverbal infants

J. Kiley Hamlin, Karen Wynn, Paul Bloom · Nature · 2007 · 1.6K citations

Education, Human Development, Psychology +14

The Further Evolution of Cooperation

Robert Axelrod, Douglas Dion · Science · 1988 · 849 citations

Social Sciences, Evolutionary Biology, Evolutionary Psychology +13