论文标题
稳定匹配:选择要提出的建议
Stable Matching: Choosing Which Proposals to Make
论文作者
论文摘要
为了确保所有代理通常都匹配,经典的递延接受算法需要完整的首选项列表。实际上,优先列表很短,但稳定的匹配仍然很好。这提出了两个问题: $ \ bullet $为什么运行良好? $ \ bullet $哪些建议应在其优先列表中包含哪些建议? 我们在Lee [17]引入的模型中研究了这些问题,并基于相关的红衣主教公用事业的偏好:这些公用事业是基于每个代理商的常见公共评级以及单个私人调整。 Lee表明,对于合适的公用事业功能,在大多数代理商中,在大型市场中,所有稳定的匹配都产生了相似的价值公用事业。通过一项新的分析,我们加强了李的结果,表明在大型市场中,所有$ \ y都是$,但公众收视率最低的代理商,所有稳定的比赛都产生了类似的有价值的公用事业。然后,我们可以以$ \的所有$来推断出,但公共评级最低的代理商都有一个易于识别的长度$ o(\ log n)$优先列表,其中包括其所有稳定匹配项,并解决了上面的第二个问题。我们注意到此标识使用初始通信阶段。 我们将这些结果扩展到双方具有不平等代理数量的设置,并以多对一的设置,例如雇主和工人,我们还展示了$ε$ -BAYES-NASH平衡的存在,在该平衡中,每个代理商都会做出相对较少的建议。这些结果都依赖于一种新技术来避免在延期接受算法的运行过程中发生的暂定匹配事件之间的条件。我们通过实验研究对这些理论结果进行补充。
To guarantee all agents are matched in general, the classic Deferred Acceptance algorithm needs complete preference lists. In practice, preference lists are short, yet stable matching still works well. This raises two questions: $\bullet$ Why does it work well? $\bullet$ Which proposals should agents include in their preference lists? We study these questions in a model, introduced by Lee [17], with preferences based on correlated cardinal utilities: these utilities are based on common public ratings of each agent together with individual private adjustments. Lee showed that for suitable utility functions, in large markets, with high probability, for most agents, all stable matchings yield similar valued utilities. By means of a new analysis, we strengthen Lee's result, showing that in large markets, with high probability, for $\it all$ but the agents with the lowest public ratings, all stable matchings yield similar valued utilities. We can then deduce that for $\it all$ but the agents with the lowest public ratings, each agent has an easily identified length $O(\log n)$ preference list that includes all of its stable matches, addressing the second question above. We note that this identification uses an initial communication phase. We extend these results to settings where the two sides have unequal numbers of agents, to many-to-one settings, e.g. employers and workers, and we also show the existence of an $ε$-Bayes-Nash equilibrium in which every agent makes relatively few proposals. These results all rely on a new technique for sidestepping the conditioning between the tentative matching events that occur over the course of a run of the Deferred Acceptance algorithm. We complement these theoretical results with an experimental study.