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arXiv 2007.07100cs.GT
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随机指派问题的两个新的不可能结果

Two New Impossibility Results for the Random Assignment Problem

Timo Mennle, Sven Seuken

摘要:

在本文中,我们证明了随机分配机制的两个新的不可能性结果:Bogomolnaia和Moulin(2001)表明,没有分配机制可以同时满足防策略性,序有效性和对称性,Mennle和Seuken(2017)将防策略性分解为交换单调性,上不变性和下不变性公理。对于我们的第一个不可能的结果,我们表明,上不变性,下不变性,序效率,和对称性是不相容的。这细化了先前的不可能性结果,因为它放松了交换单调性。对于我们的第二个不可能的结果,我们表明,没有分配机制满足交换单调性,较低的不变性,有序效率,匿名性,中立性和非专横。相比之下,Bogomolnaia和Moulin(2001)引入的概率序列(PS)机制在下不变性被上不变性取代时满足这些公理。因此,不可能存在PS的较低不变对应物。

英文摘要:

In this note, we prove two new impossibility results for random assignment mechanisms: Bogomolnaia and Moulin (2001) showed that no assignment mechanism can satisfy strategyproofness, ordinal efficiency, and symmetry at the same time, and Mennle and Seuken (2017) gave a decomposition of strategyproofness into the axioms swap monotonicity, upper invariance, and lower invariance. For our first impossibility result, we show that upper invariance, lower invariance, ordinal efficiency, and symmetry are incompatible. This refines the prior impossibility result because it relaxes swap monotonicity. For our second impossibility result, we show that no assignment mechanism satisfies swap monotonicity, lower invariance, ordinal efficiency, anonymity, neutrality, and non-bossiness. By contrasts, the Probabilistic Serial (PS) mechanism that Bogomolnaia and Moulin (2001) introduced, satisfies these axioms when lower invariance is replaced by upper invariance. It follows that there cannot exists a lower invariant counterpart to PS.

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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