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Delinquent Networks

Author Info

Listed author(s):
  • Coralio Ballester

    ()

    (Universidad de Alicante)

  • Antoni Calvo-Armengol

    ()

    (ICREA,Universitat Autonoma de Barcelona)

  • Yves Zenou

    ()

    (Stockholm University, Research Institute of Industrial Economics (IFN) and CREAM)

Abstract

Delinquents are embedded in a network of relationships. Social ties among delinquents are modelled by means of a graph where delinquents compete for a booty and benefit from local interactions with their neighbors. Each delinquent decides in a non cooperative way how much delinquency effort he will exert. Using the network model developed by Ballester et al. (2006), we characterize the Nash equilibrium and derive an optimal enforcement policy, called the key-player policy, which targets the delinquent who, once removed, leads to the highest aggregate delinquency reduction. We then extend our characterization of optimal single player network removal for delinquency reduction, the key player, to optimal group removal, the key group. We also characterize and derive a policy that targets links rather than players. Finally, we endogenize the network connecting delinquents by allowing players to join the labor market instead of committing delinquent offenses. The key-player policy turns out to be much more complex since it depends on wages and on the structure of the network.

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Paper provided by Centre for Research and Analysis of Migration (CReAM), Department of Economics, University College London in its series CReAM Discussion Paper Series with number 0912.

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Date of creation: Apr 2009
Handle: RePEc:crm:wpaper:0912
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Keywords: Social networks; delinquency decision; key group; NP-hard problem; crime policies;

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Find related papers by JEL classification:
  • A14 - General Economics and Teaching - - General Economics - - - Sociology of Economics
  • C72 - Mathematical and Quantitative Methods - - Game Theory and Bargaining Theory - - - Noncooperative Games
  • K42 - Law and Economics - - Legal Procedure, the Legal System, and Illegal Behavior - - - Illegal Behavior and the Enforcement of Law
  • L14 - Industrial Organization - - Market Structure, Firm Strategy, and Market Performance - - - Transactional Relationships; Contracts and Reputation

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