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arXiv 2109.05810cs.GT
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拟阵秩估值的真实与公平机制

Truthful and Fair Mechanisms for Matroid-Rank Valuations

Siddharth Barman, Paritosh Verma

摘要:

研究了不可分商品在战略代理人之间的分配问题。我们专注于设置,其中货币转移是不可用的,每个代理的私人估值是一个子模函数与二进制边缘,即,智能体的估值是拟阵秩函数。在这种设置中,我们建立了一个显着的二分法之间的两个最好的研究公平的概念,在离散的公平分工,具体来说,嫉妒自由到一个好的(EF1)和最大最小份额(MMS)。首先,我们证明了Babaioff等人的Pareto有效机制。(2021)是在拟阵秩估值下寻找EF1分配的群体策略证明。群体防策略性保证强化了Babaioff et al.(2021)的结果,该结果在相同的背景下建立了真实性(分别针对每个代理人)。我们的结果也推广了Halpern等人的工作。(2020),从二进制加法赋值到拟阵秩的情况。接下来,我们建立了一个类似的积极的结果不能实现MMS,即使在个人层面上考虑真实性。具体来说,我们证明,拟阵秩估值,不存在一个真实的机制,是指数遗忘,帕累托有效,最大公平。为了建立我们的研究结果,我们开发了一个真实的机制,拟阵秩函数的表征。事实上,这种特征适用于更广泛的赋值类(特别是适用于二进制XOS函数),并且可能是独立的兴趣。

英文摘要:

We study the problem of allocating indivisible goods among strategic agents. We focus on settings wherein monetary transfers are not available and each agent's private valuation is a submodular function with binary marginals, i.e., the agents' valuations are matroid-rank functions. In this setup, we establish a notable dichotomy between two of the most well-studied fairness notions in discrete fair division; specifically, between envy-freeness up to one good (EF1) and maximin shares (MMS). First, we show that a Pareto-efficient mechanism of Babaioff et al. (2021) is group strategy-proof for finding EF1 allocations, under matroid-rank valuations. The group strategy-proofness guarantee strengthens the result of Babaioff et al. (2021), that establishes truthfulness (individually for each agent) in the same context. Our result also generalizes a work of Halpern et al. (2020), from binary additive valuations to the matroid-rank case. Next, we establish that an analogous positive result cannot be achieved for MMS, even when considering truthfulness on an individual level. Specifically, we prove that, for matroid-rank valuations, there does not exist a truthful mechanism that is index oblivious, Pareto efficient, and maximin fair. For establishing our results, we develop a characterization of truthful mechanisms for matroid-rank functions. This characterization in fact holds for a broader class of valuations (specifically, holds for binary XOS functions) and might be of independent interest.

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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