论文标题
一些查询走很长一段路:匹配中的信息差异权衡
A Few Queries Go a Long Way: Information-Distortion Tradeoffs in Matching
论文作者
论文摘要
我们考虑了单方面的匹配问题,其中n个代理比N项目具有偏好,并且这些偏好是通过基本的基本估值功能引起的。目标是将每个代理商与单个项目匹配,以最大程度地提高社会福利。但是,大多数相关的文献都假定代理的值不是先验的,并且仅提供对代理而不是项目的顺序偏好的访问。因此,这种不完整的信息会导致效率的丧失,这是通过失真概念来衡量的。在本文中,我们进一步假设代理可以回答少量的查询,从而使我们部分访问其值。我们研究引发的基本信息(通过每个代理的查询数量)与单方面匹配的失真以及广泛研究的相关问题之间的相互作用。从定性上讲,我们的结果表明,对于有限的查询,可以对经典设置进行重大改进,在这种情况下,只能访问序数信息。
We consider the one-sided matching problem, where n agents have preferences over n items, and these preferences are induced by underlying cardinal valuation functions. The goal is to match every agent to a single item so as to maximize the social welfare. Most of the related literature, however, assumes that the values of the agents are not a priori known, and only access to the ordinal preferences of the agents over the items is provided. Consequently, this incomplete information leads to loss of efficiency, which is measured by the notion of distortion. In this paper, we further assume that the agents can answer a small number of queries, allowing us partial access to their values. We study the interplay between elicited cardinal information (measured by the number of queries per agent) and distortion for one-sided matching, as well as a wide range of well-studied related problems. Qualitatively, our results show that with a limited number of queries, it is possible to obtain significant improvements over the classic setting, where only access to ordinal information is given.