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Cooperation In Viscous Populations - Experimental Evidence

Mengel, F and Grimm, V (2007) Cooperation In Viscous Populations - Experimental Evidence. UNSPECIFIED. Instituto Valenciano de Investigaciones Econ�micas, S.A. (Ivie) 2007-17.

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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. The degree of viscosity is varied across treatments. We find that viscosity produces an endogenous sorting of cooperators and defectors and persistently high rates ofcooperation. Higher viscosity leads to a sharp increase in overall cooperation rates and in addition positively affects the subjects' intrinsic willingness to cooperate.

Item Type: Monograph (UNSPECIFIED)
Uncontrolled Keywords: Experiments; Cooperation; Group Selection; Norms; Population
Subjects: H Social Sciences > HB Economic Theory
Divisions: Faculty of Social Sciences > Economics, Department of
Depositing User: Jim Jamieson
Date Deposited: 02 Feb 2015 10:14
Last Modified: 09 Jan 2018 17:15

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