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arXiv 2602.08871cs.GTcs.DMcs.DS
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度量投票中的有限随机性扭曲

Distortion of Metric Voting with Bounded Randomness

Rutgers University(罗格斯大学);Stanford University(斯坦福大学)

Ziyi Cai, D. D. Gao, Prasanna Ramakrishnan, Kangning Wang

AI总结:

本研究提出了一种在有限随机性下实现低于3扭曲的投票规则,通过结合确定性选择和随机化方法,提升了投票系统的效率与公平性。

摘要:

我们研究了在度量扭曲框架下投票规则的设计。已知任何确定性规则的扭曲至少为3,而随机化规则可以实现严格小于3的扭曲,但通常以减少透明度和可解释性为代价。在本工作中,我们通过探讨这些范式之间的权衡,研究是否可以通过仅使用“有限”的随机性来突破3的扭曲界限。我们通过提出一个投票规则来回答这个问题:(1) 实现至多3-ε的扭曲,其中ε是一个绝对常数;(2) 从一个确定性确定的常数大小列表中随机选择胜者。我们的分析基于最大彩票和稳定彩票的扭曲和近似的新结构性结果。

英文摘要:

We study the design of voting rules in the metric distortion framework. It is known that any deterministic rule suffers distortion of at least $3$, and that randomized rules can achieve distortion strictly less than $3$, often at the cost of reduced transparency and interpretability. In this work, we explore the trade-off between these paradigms by asking whether it is possible to break the distortion barrier of $3$ using only "bounded" randomness. We answer in the affirmative by presenting a voting rule that (1) achieves distortion of at most $3 - \varepsilon$ for some absolute constant $\varepsilon > 0$, and (2) selects a winner uniformly at random from a deterministically identified list of constant size. Our analysis builds on new structural results for the distortion and approximation of Maximal Lotteries and Stable Lotteries.

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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