Payoff-based learning explains the decline in cooperation in public goods games.

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Reinforcement Learning Explains Conditional Cooperation and Its Moody Cousin. PLoS Comput Biol (2016) 0.77

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Social learning and the demise of costly cooperation in humans. Proc Biol Sci (2017) 0.75

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Altruistic punishment in humans. Nature (2002) 22.69

The nature of human altruism. Nature (2003) 15.62

Evolution of indirect reciprocity by image scoring. Nature (1998) 14.44

Evolution of indirect reciprocity. Nature (2005) 10.38

Monkeys reject unequal pay. Nature (2003) 9.49

Cooperation through image scoring in humans. Science (2000) 8.81

Costly punishment across human societies. Science (2006) 7.41

Volunteering as Red Queen mechanism for cooperation in public goods games. Science (2002) 7.01

Spontaneous giving and calculated greed. Nature (2012) 6.75

Evolutionary explanations for cooperation. Curr Biol (2007) 5.37

Chimpanzees are rational maximizers in an ultimatum game. Science (2007) 3.56

Volunteering leads to rock-paper-scissors dynamics in a public goods game. Nature (2003) 3.03

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Chimpanzees play the ultimatum game. Proc Natl Acad Sci U S A (2013) 2.03

Resistance to extreme strategies, rather than prosocial preferences, can explain human cooperation in public goods games. Proc Natl Acad Sci U S A (2010) 1.30

Prosocial preferences do not explain human cooperation in public-goods games. Proc Natl Acad Sci U S A (2012) 1.30

The inter-group comparison-intra-group cooperation hypothesis: comparisons between groups increase efficiency in public goods provision. PLoS One (2013) 0.97

Experimental, cultural, and neural evidence of deliberate prosociality. Trends Cogn Sci (2013) 0.85