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A comparison of Dodgson's method and Kemeny's rule

Author

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  • Thomas C. Ratliff

    (Department of Mathematics, Wheaton College, Norton, MA 02766-0930, USA)

Abstract

In an election without a Condorcet winner, Dodgson's method is designed to find the candidate that is "closest" to being a Condorcet winner. Similarly, if the head-to-head elections among all candidates do not give a complete transitive ranking, then Kemeny's Rule finds the "closest" transitive ranking. This paper uses geometric techniques to compare Dodgson's and Kemeny's notions of closeness and explain how conflict can arise between the two methods.

Suggested Citation

  • Thomas C. Ratliff, 2001. "A comparison of Dodgson's method and Kemeny's rule," Social Choice and Welfare, Springer;The Society for Social Choice and Welfare, vol. 18(1), pages 79-89.
    • Handle: RePEc:spr:sochwe:v:18:y:2001:i:1:p:79-89
    Note: Received: 19 October 1999/Accepted: 6 December 1999
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    Citations

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    Cited by:

    1. Klamler, Christian, 2004. "The Dodgson ranking and the Borda count: a binary comparison," Mathematical Social Sciences, Elsevier, vol. 48(1), pages 103-108, July.
    2. Mostapha Diss & Eric Kamwa & Abdelmonaim Tlidi, 2020. "On Some k -scoring Rules for Committee Elections: Agreement and Condorcet Principle," Revue d'économie politique, Dalloz, vol. 130(5), pages 699-725.
    3. Mostapha Diss & Eric Kamwa & Abdelmonaim Tlidi, 2019. "On some k-scoring rules for committee elections: agreement and Condorcet Principle," Working Papers hal-02147735, HAL.
    4. Irène Charon & Olivier Hudry, 2010. "An updated survey on the linear ordering problem for weighted or unweighted tournaments," Annals of Operations Research, Springer, vol. 175(1), pages 107-158, March.
    5. Darmann, Andreas & Grundner, Julia & Klamler, Christian, 2019. "Evaluative voting or classical voting rules: Does it make a difference? Empirical evidence for consensus among voting rules," European Journal of Political Economy, Elsevier, vol. 59(C), pages 345-353.
    6. Lederer, Patrick, 2024. "Bivariate scoring rules: Unifying the characterizations of positional scoring rules and Kemeny's rule," Journal of Economic Theory, Elsevier, vol. 218(C).
    7. Andreas Darmann & Julia Grundner & Christian Klamler, 2017. "Consensus in the 2015 Provincial Parliament Election in Styria, Austria: Voting Rules,Outcomes, and the Condorcet Paradox," Graz Economics Papers 2017-13, University of Graz, Department of Economics.
    8. Christian Klamler, 2003. "A comparison of the Dodgson method and the Copeland rule," Economics Bulletin, AccessEcon, vol. 4(8), pages 1-7.
    9. Christian Klamler, 2003. "Kemeny's rule and Slater''s rule: A binary comparison," Economics Bulletin, AccessEcon, vol. 4(35), pages 1-7.
    10. Lamboray, Claude, 2007. "A comparison between the prudent order and the ranking obtained with Borda's, Copeland's, Slater's and Kemeny's rules," Mathematical Social Sciences, Elsevier, vol. 54(1), pages 1-16, July.

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