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Cooperation in viscous populations--Experimental evidence

Grimm, V and Mengel, F (2009) 'Cooperation in viscous populations--Experimental evidence.' Games and Economic Behavior, 66 (1). pp. 202-220. ISSN 0899-8256

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We experimentally investigate the effect of population viscosity (an increased probability to interact with others of one's type or group) on cooperation in a standard prisoner's dilemma environment. Subjects can repeatedly choose between two groups that differ in the defector gain in the associated prisoner's dilemma. Choosing into the group with the smaller defector-gain can signal one's willingness to cooperate. We find that viscosity produces an endogenous sorting of cooperators and defectors and persistently high rates of cooperation. Higher viscosity leads to a sharp increase in overall cooperation rates and in addition positively affects the subjects' preferences for cooperation.

Item Type: Article
Uncontrolled Keywords: Experiments; Cooperation; Group selection; Norms; Population viscosity
Subjects: H Social Sciences > HB Economic Theory
Divisions: Faculty of Social Sciences
Faculty of Social Sciences > Economics, Department of
SWORD Depositor: Elements
Depositing User: Elements
Date Deposited: 07 Mar 2013 11:47
Last Modified: 15 Jan 2022 00:48

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