SERIEs

, Volume 3, Issue 1–2, pp 1–14 | Cite as

Deciding whether a law is constitutional, interpretable, or unconstitutional

  • Pablo Amorós
  • Ricardo Martínez
  • Bernardo Moreno
  • M. Socorro Puy
Open Access
Original Article

Abstract

A high court has to decide whether a law is constitutional, unconstitutional 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.

Keywords

Runoff voting system Condorcet consistency Strategy-proofness Implementation theory 

JEL Classification

C72 D71 D78 

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Copyright information

© The Author(s) 2011

This article is published under license to BioMed Central Ltd. Open Acces This article is distributed under the terms of the Creative Commons Attribution License which permits any use, distribution and reproduction in any medium, provided the original author(s) and source are credited.

Authors and Affiliations

  • Pablo Amorós
    • 1
  • Ricardo Martínez
    • 1
  • Bernardo Moreno
    • 1
  • M. Socorro Puy
    • 1
  1. 1.Departamento de Teoría e Historia EconómicaUniversidad de MálagaMálagaSpain

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