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arXiv 2201.08774cs.GT
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买一赠一$\&$买一赠一:配对市场的双边操纵

Two for One $\&$ One for All: Two-Sided Manipulation in Matching Markets

Hadi Hosseini, Fatima Umar, Rohit Vaish

摘要:

双边匹配市场中的策略行为传统上是在“单边”操纵环境中研究的,其中误报的代理人也是预期的受益者。我们的工作是调查“双侧”操纵的延迟接受算法的误报代理人和操纵者(或受益人)是在不同的方面。具体来说,我们概括了最近提出的共犯操纵模型(一个男人代表一个女人误报)沿着两个互补的维度:(a)一对一模型,一对误报代理人(男人和女人)和一个受益人(误报的女人),和(b)一个为所有的模型,一个误报代理人(男人)和一个受益人联盟(所有妇女)。我们的主要贡献是开发多项式时间算法,找到一个最佳的操作在这两种设置。我们得到这些结果,尽管事实上,最佳的一个为所有的策略未能不显眼,而目前还不清楚是否最佳的两个为一个策略满足不显眼属性。我们还研究了条件下,所得到的匹配的稳定性是保留的。实验上,我们表明,双边操纵更频繁地提供,并提供更好的质量比他们的单边同行的匹配。

英文摘要:

Strategic behavior in two-sided matching markets has been traditionally studied in a "one-sided" manipulation setting where the agent who misreports is also the intended beneficiary. Our work investigates "two-sided" manipulation of the deferred acceptance algorithm where the misreporting agent and the manipulator (or beneficiary) are on different sides. Specifically, we generalize the recently proposed accomplice manipulation model (where a man misreports on behalf of a woman) along two complementary dimensions: (a) the two for one model, with a pair of misreporting agents (man and woman) and a single beneficiary (the misreporting woman), and (b) the one for all model, with one misreporting agent (man) and a coalition of beneficiaries (all women). Our main contribution is to develop polynomial-time algorithms for finding an optimal manipulation in both settings. We obtain these results despite the fact that an optimal one for all strategy fails to be inconspicuous, while it is unclear whether an optimal two for one strategy satisfies the inconspicuousness property. We also study the conditions under which stability of the resulting matching is preserved. Experimentally, we show that two-sided manipulations are more frequently available and offer better quality matches than their one-sided counterparts.

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