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Deciding Whether a Law is Constitutional, Interpretable, or Unconstitutional

Author

Listed:
  • Pablo Amorós

    () (Department of Economic Theory, Universidad de Málaga)

  • Ricardo Martínez

    () (Department of Economic Theory, Universidad de Málaga)

  • Bernardo Moreno

    () (Department of Economic Theory, Universidad de Málaga)

  • M. Socorro Puy

    () (Department of Economic Theory, Universidad de Málaga)

Abstract

A high court has to decide whether a law is constitutional, un- constitutional, or interpretable. The voting system is runoff. Runoff voting systems can be interpreted both, as social choice functions or as mechanisms. It is known that, for universal domains of preferences, runoff voting systems have several drawbacks as social choice functions. Although in our setting the preferences are restricted to be single-peaked over three alternatives, these problems persist. Runoff mechanisms are not well-behaved either: they do not implement any Condorcet consistent social choice function in undominated subgame perfect Nash equilibria. We show, however, that some Condorcet consistent social choice functions can be implemented in dominant strategies via other simple and natural mechanisms.

Suggested Citation

  • Pablo Amorós & Ricardo Martínez & Bernardo Moreno & M. Socorro Puy, 2010. "Deciding Whether a Law is Constitutional, Interpretable, or Unconstitutional," Working Papers 2010-09, Universidad de Málaga, Department of Economic Theory, Málaga Economic Theory Research Center.
  • Handle: RePEc:mal:wpaper:2010-9
    as

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    File URL: http://webdeptos.uma.es/THEconomica/malagawpseries/Papers/METCwp2010-9.pdf
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    References listed on IDEAS

    as
    1. Moore, John & Repullo, Rafael, 1988. "Subgame Perfect Implementation," Econometrica, Econometric Society, vol. 56(5), pages 1191-1220, September.
    2. Eric Maskin, 1999. "Nash Equilibrium and Welfare Optimality," Review of Economic Studies, Oxford University Press, vol. 66(1), pages 23-38.
    3. repec:cup:apsrev:v:90:y:1996:i:01:p:34-45_20 is not listed on IDEAS
    4. Duggan, John & Martinelli, Cesar, 2001. "A Bayesian Model of Voting in Juries," Games and Economic Behavior, Elsevier, vol. 37(2), pages 259-294, November.
    5. Gibbard, Allan, 1973. "Manipulation of Voting Schemes: A General Result," Econometrica, Econometric Society, vol. 41(4), pages 587-601, July.
    6. Bag, Parimal Kanti & Sabourian, Hamid & Winter, Eyal, 2009. "Multi-stage voting, sequential elimination and Condorcet consistency," Journal of Economic Theory, Elsevier, vol. 144(3), pages 1278-1299, May.
    Full references (including those not matched with items on IDEAS)

    More about this item

    Keywords

    Runoff voting system; Condorcet consistency; strategy-proofness; implementation theory;

    JEL classification:

    • C72 - Mathematical and Quantitative Methods - - Game Theory and Bargaining Theory - - - Noncooperative Games
    • D71 - Microeconomics - - Analysis of Collective Decision-Making - - - Social Choice; Clubs; Committees; Associations
    • D78 - Microeconomics - - Analysis of Collective Decision-Making - - - Positive Analysis of Policy Formulation and Implementation

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