Paradoxical Oddities in Two Multiwinner Elections from Scotland

Adam Graham-Squire and David McCune

Papers from arXiv.org

Abstract: Ranked-choice voting anomalies such as monotonicity paradoxes have been extensively studied through creating hypothetical examples and generating elections under various models of voter behavior. However, very few real-world examples of such voting paradoxes have been found and analyzed. We investigate two single-transferable vote elections from Scotland that demonstrate upward monotonicity, downward monotonicity, no-show, and committee size paradoxes. These paradoxes are rarely observed in real-world elections, and this article is the first case study of such paradoxes in multiwinner elections.

Date: 2023-05
New Economics Papers: this item is included in nep-cdm and nep-pol
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Published in Math. Gaz. 108 (2024) 492-506

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