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Cooperation among strangers: an experiment with indefinite interaction

  • Gabriele Camera
  • Marco Casari

We study the emergence of norms of cooperation in experimental economies populated by strangers interacting indefinitely and lacking formal enforcement institutions. In all treatments the efficient outcome is sustainable as an equilibrium. We address the following questions: can these economies achieve full efficiency? Which institutions for monitoring and enforcement promote cooperation? Finally, what classes of strategies are employed to achieve high efficiency? We find that, first, cooperation can be sustained even in anonymous settings; second, some type of monitoring and punishment institutions significantly promote cooperation; and, third, subjects dislike indiscriminate strategies and prefer selective strategies.

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Paper provided by Purdue University, Department of Economics in its series Purdue University Economics Working Papers with number 1201.

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Length: 47 pages
Date of creation: Jun 2007
Date of revision:
Handle: RePEc:pur:prukra:1201
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