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Voluntarily Separable Prisoner's Dilemma

  • Takako Fujiwara-Greve

    (Department of Economics, Keio University and Department of Economics, Norwegian School of Management BI)

  • Masahiro Okuno-Fujiwara

    (Faculty of Economics, University of Tokyo)

We develop a general framework to analyze endogenous relationships. To consider relationships in the modern society, neither one-shot games nor repeated games are appropriatemodelsbecausethe formationand dissolutionofa relationship is not an option. We formulate voluntarily separable repeated games, in which players are randomly matched t oplay acomponentgameaswellastochoose whether to play the game again with the same partner. There is no information flow across matches, and players are boundedly rational. We extend the notion of Neutrally Stable Distribution (NSD) to fit for our model. When the component game is a prisoner's dilemma, NSD requires some trust-building periods to defect at the beginning of a partnership. We ?nd that polymorphic NSDs with voluntary breakups include strategies with shorter trust-building periods than any monomorphic NSD with no voluntary separation, and hence the average payo? ofpolymorphic NSD is higher.

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File URL: http://www.cirje.e.u-tokyo.ac.jp/research/dp/2006/2006cf415.pdf
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Paper provided by CIRJE, Faculty of Economics, University of Tokyo in its series CIRJE F-Series with number CIRJE-F-415.

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Length: 47pages
Date of creation: Apr 2006
Date of revision:
Handle: RePEc:tky:fseres:2006cf415
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