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Deciding whether a law is constitutional, interpretable, or unconstitutional

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  • Pablo Amorós

    ()

  • Ricardo Martínez
  • Bernardo Moreno
  • M. Puy

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.

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File URL: http://hdl.handle.net/10.1007/s13209-011-0039-6
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Bibliographic Info

Article provided by Spanish Economic Association in its journal SERIEs.

Volume (Year): 3 (2012)
Issue (Month): 1 (March)
Pages: 1-14

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Handle: RePEc:spr:series:v:3:y:2012:i:1:p:1-14

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Related research

Keywords: Runoff voting system; Condorcet consistency; Strategy-proofness; Implementation theory; C72; D71; D78;

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  1. Moore, John & Repullo, Rafael, 1988. "Subgame Perfect Implementation," Econometrica, Econometric Society, vol. 56(5), pages 1191-1220, September.
  2. Gibbard, Allan, 1973. "Manipulation of Voting Schemes: A General Result," Econometrica, Econometric Society, vol. 41(4), pages 587-601, July.
  3. John Duggan & Cesar Martinelli, 1999. "A Bayesian Model of Voting in Juries," Working Papers 9904, Centro de Investigacion Economica, ITAM.
  4. Eric Maskin, 1998. "Nash Equilibrium and Welfare Optimality," Harvard Institute of Economic Research Working Papers 1829, Harvard - Institute of Economic Research.
  5. 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.
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