Research Article | | Peer-Reviewed

Geometric Voting Vector Analysis of Strategic Candidate Nomination and Voter Retaliation in Positional Voting

Received: 25 May 2025     Accepted: 10 June 2025     Published: 25 June 2025
Views:       Downloads:
Abstract

Positional voting fails both the Independence of Irrelevant Alternatives and the Independence of Clones criteria. It is therefore vulnerable to the strategic nomination of insincere candidates that may adversely affect election outcomes. By introducing identical clones, other candidates may be either promoted or demoted in the resultant collective ranking. The analysis of the ramifications of cloning is restricted here to ‘geometric voting’ vectors where preference weightings form a geometric progression. With the common ratio of the weightings as the sole variable, a full continuous spectrum of vectors from plurality through the Borda count to anti-plurality can be simultaneously analyzed. This universal vector may handle any given number of candidates. Starting with an example three-candidate election, the effect of varying the common ratio and the margin between the clone and non-clone candidates is analyzed. It is then extended to include additional such candidates. Cloning maps that display all possible election outcomes for the example elections are introduced. They exhibit regions where teaming attempts either succeed or fail; the latter due to vote-splitting. The geometric voting vector that represents all those from the Borda count to anti-plurality is highly vulnerable to teaming while the one equivalent to plurality is instead vulnerable to vote-splitting. The intermediate vector with a common ratio of one-half – called the consecutively halved positional voting vector – is a balanced one with no net bias towards either polarizing or consensus candidates. The research here establishes that this vector exactly counterbalances the possibilities for teaming against those for vote-splitting when a non-cloned candidate and a pre-cloned one are tied. Also, it inherently thwarts teaming attempts where identical clones are undifferentiated, and is the most consensual vector to exhibit this property. Further, it enables opposition voters to retaliate successfully using a tit-for-tat clone-reversal strategy even when one clone is consistently promoted by clone supporters over the others. Unlike the Borda count, it possesses such disincentives to clone candidates. This balanced vector hence offers an optimal compromise between maximizing the consensus index of a geometric voting vector and minimizing its vulnerability to teaming attempts through strategic nominations.

Published in Social Sciences (Volume 14, Issue 3)
DOI 10.11648/j.ss.20251403.18
Page(s) 274-294
Creative Commons

This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited.

Copyright

Copyright © The Author(s), 2025. Published by Science Publishing Group

Keywords

Positional Voting, Geometric Voting, Borda Count, Plurality, Strategic Nomination, Cloning, Teaming, Vote-Splitting

References
[1] Saari, D. G. Positional Voting and the BC. In Basic Geometry of Voting. Berlin: Springer-Verlag; 1995, pp. 101-199.
[2] Tideman, N. Vote Processing Rules for Selecting One Option from Many When Votes Have Predetermined Weights: Alternatives to Plurality. In Collective Decisions and Voting. Farnham, England: Ashgate; 2006, pp. 165-243.
[3] Reilly, B. Social Choice in the South Seas: Electoral Innovation and the Borda Count in the Pacific Island Countries. International Political Science Review. 2002, 23(4), 364–366.
[4] Fraenkel, J., Grofman, B. The Borda Count and its real-world alternatives: Comparing scoring rules in Nauru and Slovenia. Australian Journal of Political Science. 2014, 49(2), 186-205.
[5] Reynolds, A., Reilly, B., Ellis, A. Electoral System Design: The New International IDEA Handbook. Stockholm: Strömsborg; 2008.
[6] Szpiro, G. G. Numbers Rule: The Vexing Mathematics of Democracy from Plato to the Present. Princeton: Princeton University Press; 2010, pp. 71-72.
[7] Mendenhall, P. C., Switkay, H. M. Consecutively Halved Positional Voting: A Special Case of Geometric Voting. Social Sciences. 2023, 12(2), 47-59.
[8] Kondratev, A. Y., Ianovski, E., Nesterov, A. S. How should we score athletes and candidates: Geometric Scoring Rules. Available from:
[9] Mendenhall, P. C. Geometric Voting and Consecutively Halved Positional Voting. Self-published. Available from:
[10] Arrow, K. J. Social Choice and Individual Values. Connecticut, USA: Yale University Press; 1951. ISBN 0300179316.
[11] Peters, H., Wakker, P. Independence of Irrelevant Alternatives and Revealed Group Preferences. Econometrica. 1991, 59(6), 1787–1801.
[12] Green-Armytage, J. Strategic voting and nomination. Social Choice and Welfare. Springer Science and Business Media; 2014, 42(1), 111–138.
[13] Tideman, T. N. Independence of clones as a criterion for voting rules. Social Choice and Welfare. Springer Science and Business Media; 1987, 4(3), 185-206.
[14] Nauru Electoral Commission. 2019 Parliamentary Election Final Report. Available from:
[15] Nauru Electoral Commission. 2022 Parliamentary Election Results. Available from:
[16] Black, D. The Theory of Committees and Elections. Cambridge: Cambridge University Press; 1958.
[17] Saari, D. G. Disposing Dictators, Demystifying Voting Paradoxes: Social Choice Analysis. Cambridge: Cambridge University Press; 2008, Ch. 1 & 5.
[18] Saari, D. G. Decisions and Elections: Explaining the Unexpected. Cambridge: Cambridge University Press; 2001, p23.
Cite This Article
  • APA Style

    Mendenhall, P. C. (2025). Geometric Voting Vector Analysis of Strategic Candidate Nomination and Voter Retaliation in Positional Voting. Social Sciences, 14(3), 274-294. https://doi.org/10.11648/j.ss.20251403.18

    Copy | Download

    ACS Style

    Mendenhall, P. C. Geometric Voting Vector Analysis of Strategic Candidate Nomination and Voter Retaliation in Positional Voting. Soc. Sci. 2025, 14(3), 274-294. doi: 10.11648/j.ss.20251403.18

    Copy | Download

    AMA Style

    Mendenhall PC. Geometric Voting Vector Analysis of Strategic Candidate Nomination and Voter Retaliation in Positional Voting. Soc Sci. 2025;14(3):274-294. doi: 10.11648/j.ss.20251403.18

    Copy | Download

  • @article{10.11648/j.ss.20251403.18,
      author = {Peter Charles Mendenhall},
      title = {Geometric Voting Vector Analysis of Strategic Candidate Nomination and Voter Retaliation in Positional Voting},
      journal = {Social Sciences},
      volume = {14},
      number = {3},
      pages = {274-294},
      doi = {10.11648/j.ss.20251403.18},
      url = {https://doi.org/10.11648/j.ss.20251403.18},
      eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ss.20251403.18},
      abstract = {Positional voting fails both the Independence of Irrelevant Alternatives and the Independence of Clones criteria. It is therefore vulnerable to the strategic nomination of insincere candidates that may adversely affect election outcomes. By introducing identical clones, other candidates may be either promoted or demoted in the resultant collective ranking. The analysis of the ramifications of cloning is restricted here to ‘geometric voting’ vectors where preference weightings form a geometric progression. With the common ratio of the weightings as the sole variable, a full continuous spectrum of vectors from plurality through the Borda count to anti-plurality can be simultaneously analyzed. This universal vector may handle any given number of candidates. Starting with an example three-candidate election, the effect of varying the common ratio and the margin between the clone and non-clone candidates is analyzed. It is then extended to include additional such candidates. Cloning maps that display all possible election outcomes for the example elections are introduced. They exhibit regions where teaming attempts either succeed or fail; the latter due to vote-splitting. The geometric voting vector that represents all those from the Borda count to anti-plurality is highly vulnerable to teaming while the one equivalent to plurality is instead vulnerable to vote-splitting. The intermediate vector with a common ratio of one-half – called the consecutively halved positional voting vector – is a balanced one with no net bias towards either polarizing or consensus candidates. The research here establishes that this vector exactly counterbalances the possibilities for teaming against those for vote-splitting when a non-cloned candidate and a pre-cloned one are tied. Also, it inherently thwarts teaming attempts where identical clones are undifferentiated, and is the most consensual vector to exhibit this property. Further, it enables opposition voters to retaliate successfully using a tit-for-tat clone-reversal strategy even when one clone is consistently promoted by clone supporters over the others. Unlike the Borda count, it possesses such disincentives to clone candidates. This balanced vector hence offers an optimal compromise between maximizing the consensus index of a geometric voting vector and minimizing its vulnerability to teaming attempts through strategic nominations.},
     year = {2025}
    }
    

    Copy | Download

  • TY  - JOUR
    T1  - Geometric Voting Vector Analysis of Strategic Candidate Nomination and Voter Retaliation in Positional Voting
    AU  - Peter Charles Mendenhall
    Y1  - 2025/06/25
    PY  - 2025
    N1  - https://doi.org/10.11648/j.ss.20251403.18
    DO  - 10.11648/j.ss.20251403.18
    T2  - Social Sciences
    JF  - Social Sciences
    JO  - Social Sciences
    SP  - 274
    EP  - 294
    PB  - Science Publishing Group
    SN  - 2326-988X
    UR  - https://doi.org/10.11648/j.ss.20251403.18
    AB  - Positional voting fails both the Independence of Irrelevant Alternatives and the Independence of Clones criteria. It is therefore vulnerable to the strategic nomination of insincere candidates that may adversely affect election outcomes. By introducing identical clones, other candidates may be either promoted or demoted in the resultant collective ranking. The analysis of the ramifications of cloning is restricted here to ‘geometric voting’ vectors where preference weightings form a geometric progression. With the common ratio of the weightings as the sole variable, a full continuous spectrum of vectors from plurality through the Borda count to anti-plurality can be simultaneously analyzed. This universal vector may handle any given number of candidates. Starting with an example three-candidate election, the effect of varying the common ratio and the margin between the clone and non-clone candidates is analyzed. It is then extended to include additional such candidates. Cloning maps that display all possible election outcomes for the example elections are introduced. They exhibit regions where teaming attempts either succeed or fail; the latter due to vote-splitting. The geometric voting vector that represents all those from the Borda count to anti-plurality is highly vulnerable to teaming while the one equivalent to plurality is instead vulnerable to vote-splitting. The intermediate vector with a common ratio of one-half – called the consecutively halved positional voting vector – is a balanced one with no net bias towards either polarizing or consensus candidates. The research here establishes that this vector exactly counterbalances the possibilities for teaming against those for vote-splitting when a non-cloned candidate and a pre-cloned one are tied. Also, it inherently thwarts teaming attempts where identical clones are undifferentiated, and is the most consensual vector to exhibit this property. Further, it enables opposition voters to retaliate successfully using a tit-for-tat clone-reversal strategy even when one clone is consistently promoted by clone supporters over the others. Unlike the Borda count, it possesses such disincentives to clone candidates. This balanced vector hence offers an optimal compromise between maximizing the consensus index of a geometric voting vector and minimizing its vulnerability to teaming attempts through strategic nominations.
    VL  - 14
    IS  - 3
    ER  - 

    Copy | Download

Author Information
  • Geometric Voting, Nottingham, England

  • Sections