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arXiv 2412.02435cs.GTecon.TH
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通过简单支付方案实现近似公平且群体一致的预算划分

Approximately Fair and Population Consistent Budget Division via Simple Payment Schemes

Haris Aziz, Patrick Lederer, Xinhang Lu, Mashbat Suzuki, Jeremy Vollen

AI总结:

针对基于认可的预算划分问题,提出最大支付规则MP,证明其满足单调性、群体一致性且对平均公平份额达2倍近似比,且是序列支付规则类别中最优的规则。

摘要:

在基于认可的预算划分问题中,需要根据选民对候选人的认可选票将预算分配给各位候选人。为寻求适用于该场景的简单、一致且近似公平的规则,本文提出最大支付规则(maximum payment rule,MP)。在该规则下,每位选民掌控一部分预算,每一步中,拥有非零预算的选民将其全部预算分配给获得最多选民认可的候选人。我们证明MP满足我们的标准:它具备单调性,满足严格的群体一致性条件,并且对平均公平份额(average fair share,AFS)这一公平概念达到2倍近似比。此外,我们将MP推广到序列支付规则类别,并证明它是该类别中最优的规则:除了MP和另一条规则外,所有序列支付规则都不满足单调性,且对AFS的近似比仅能实现小幅提升。

英文摘要:

In approval-based budget division, a budget needs to be distributed to candidates based on the voters' approval ballots over these candidates. In the pursuit of a simple, consistent, and approximately fair rule for this setting, we introduce the maximum payment rule (MP). Under this rule, each voter controls a part of the budget and, in each step, the corresponding voters allocate their entire budget to the candidate approved by the largest number of voters with non-zero budget. We show that MP meets our criteria as it satisfies monotonicity and a demanding population consistency condition and gives a $2$-approximation to a fairness notion called average fair share (AFS). Moreover, we generalize MP to the class of sequential payment rule and prove that it is the most desirable rule in this class: all sequential payment rules but MP and one other rule fail monotonicity while only allowing for a small improvement in the approximation ratio to AFS.

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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