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Social Norms, Local Interaction, and Neighborhood Planning

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Author Info

  • Matthew Haag

    (Georgetown University)

  • Roger Lagunoff

    (Georgetown University)

Abstract

This paper examines optimal social linkage when each individual's repeated interaction with each of his neighbors creates spillovers. Individuals differ across rates of time preference. A planner must choose a local interaction system or neighborhood design before observing the realization of these rates. Given the planner's choice of design and a realization of discount factors, each individual plays a repeated Prisoner's Dilemma game with his neighbors. We introduce the concept of a local trigger strategy equilibrium (LTSE) to describe a stationary sequential equilibrium in which, for any realization of discount factors, each individual conditions his cooperation on the cooperation of at least one "acceptable" group of neighbors. The presence of impatient types implies that some free riding may be tolerated in equilibrium. When residents' discount factors are known to the planner, the optimal design exhibits a cooperative "core" and an uncooperative "fringe." Uncooperative (impatient) types are connected to cooperative ones who tolerate their free riding so that social conflict is kept to a minimum. By contrast, when residents' discount factors are independently distributed, the optimal design partitions individuals into maximally connected cliques (e.g., cul-de-sacs). In that case, each person's cooperation decision becomes a pure local public good. Finally, if types are correlated, then incomplete graphs with small overlap (e.g., grids) are possible.

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File URL: http://128.118.178.162/eps/game/papers/9907/9907004.pdf
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Bibliographic Info

Paper provided by EconWPA in its series Game Theory and Information with number 9907004.

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Date of creation: 27 Jul 1999
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Handle: RePEc:wpa:wuwpga:9907004

Note: Type of Document - PDF; prepared on IBM PC; to print on HP;
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Web page: http://128.118.178.162

Related research

Keywords: repeated games; local interaction; social norms; neighborhood design; local trigger strategy;

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  1. Kyle Bagwell & Robert W. Staiger, 1997. "Regionalism and Multilateral Tariff Cooperation," NBER Working Papers 5921, National Bureau of Economic Research, Inc.
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