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arXiv 2312.08798cs.GTecon.TH
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基于认可的委员会选举中的参与激励

Participation Incentives in Approval-Based Committee Elections

Martin Bullinger, Chris Dong, Patrick Lederer, Clara Mehler

AI总结:

本文首次研究基于认可的委员会(ABC)投票规则的参与激励属性,证明ABC评分规则满足群体参与性、多数序贯规则不满足参与性,并给出序贯规则满足参与性的三类规避路径。

摘要:

在基于认可的委员会(ABC)投票中,目标是根据选民对候选人的认可偏好,选出预设规模的候选人子集。尽管近年来该问题受到广泛关注,但针对给定ABC投票规则,选民参与选举的激励问题迄今仍被忽视。因此,本文首次明确研究ABC投票规则的这一通常被称为“参与性”的属性。具体而言,我们证明所有ABC评分规则甚至满足群体参与性,而大多数序贯规则严重不满足参与性。我们进一步探索了规避序贯ABC投票规则不可能性的几条路径:对众多序贯规则证明了以下三点:(i)它们在层状偏好剖面下满足参与性;(ii)不认可任何当选候选人的选民无法通过弃权(不执行)获益;(iii)选民判断自己是否能从弃权(不执行)中获益是NP难的。

英文摘要:

In approval-based committee (ABC) voting, the goal is to choose a subset of predefined size of the candidates based on the voters' approval preferences over the candidates. While this problem has attracted significant attention in recent years, the incentives for voters to participate in an election for a given ABC voting rule have been neglected so far. This paper is thus the first to explicitly study this property, typically called participation, for ABC voting rules. In particular, we show that all ABC scoring rules even satisfy group participation, whereas most sequential rules severely fail participation. We furthermore explore several escape routes to the impossibility for sequential ABC voting rules: we prove for many sequential rules that (i) they satisfy participation on laminar profiles, (ii) voters who approve none of the elected candidates cannot benefit by abstaining, and (iii) it is NP-hard for a voter to decide whether she benefits from abstaining.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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