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arXiv 1407.2576cs.GT
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分配市场中核心的大小

The size of the core in assignment markets

Yash Kanoria, Daniela Saban, Jay Sethuraman

摘要:

分配市场涉及与转移相匹配,如劳动力市场和住房市场。我们考虑一个双边分配市场的代理类型和随机结构类似的模型在实证研究中,并在这样的市场的核心的大小特征。每个代理具有相对于另一侧上的每种类型的代理的随机抽取的生产率。从一对代理之间的匹配生成的值是两个生产力项的总和,每个生产力项仅取决于代理之一的类型而不是身份,以及由这对类型驱动的第三个确定性项。我们允许代理的数量增长,保持代理类型的数量固定。设$n$为代理数量,$K$为具有更多类型的市场一侧的类型数量。我们发现,在合理的假设下,每个代理人的效用超过核心成果的相对变化是有界的$O^*(1/n^{1/K})$,其中多对数因子已被抑制。进一步证明了在最坏的情况下,这个界是紧的。我们还提供了一个更严格的约束下更严格的假设。我们的研究结果提供了部分理由的典型假设的一个独特的核心结果在实证研究。

英文摘要:

Assignment markets involve matching with transfers, as in labor markets and housing markets. We consider a two-sided assignment market with agent types and stochastic structure similar to models used in empirical studies, and characterize the size of the core in such markets. Each agent has a randomly drawn productivity with respect to each type of agent on the other side. The value generated from a match between a pair of agents is the sum of the two productivity terms, each of which depends only on the type but not the identity of one of the agents, and a third deterministic term driven by the pair of types. We allow the number of agents to grow, keeping the number of agent types fixed. Let $n$ be the number of agents and $K$ be the number of types on the side of the market with more types. We find, under reasonable assumptions, that the relative variation in utility per agent over core outcomes is bounded as $O^*(1/n^{1/K})$, where polylogarithmic factors have been suppressed. Further, we show that this bound is tight in worst case. We also provide a tighter bound under more restrictive assumptions. Our results provide partial justification for the typical assumption of a unique core outcome in empirical studies.

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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