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arXiv 2004.14640cs.GTecon.TH
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具有多样性偏好的稳定室友问题

Stable Roommate Problem with Diversity Preferences

Niclas Boehmer, Edith Elkind

摘要:

在多维稳定室友问题中,代理人必须被分配到房间,并对潜在的室友有偏好。我们研究了在代理具有多样性偏好的假设下找到代理对房间的良好分配的复杂性[Bredereck等人,2019]:每个代理属于两种类型之一(例如,大三和大四学生,艺术家和工程师),并且代理人对房间的偏好仅取决于他们自己类型的代理人在他们的潜在室友中的比例。我们认为,这种设置,如核心和交换的稳定性,帕累托最优性和无嫉妒的各种解决方案的概念。在消极的一面,我们证明了嫉妒,核心稳定或(强)交换稳定的结果可能不存在,相关的决策问题是NP完全的。在积极的一面,我们表明,这些问题是在FPT相对于房间的大小,这是不是一般的情况下稳定的室友问题。此外,对于经典的两个房间大小的设置,我们提出了一个线性时间算法,计算的结果是核心和交换稳定以及帕累托最优。我们对稳定室友问题的许多结果也可以推广到稳定婚姻问题。

英文摘要:

In the multidimensional stable roommate problem, agents have to be allocated to rooms and have preferences over sets of potential roommates. We study the complexity of finding good allocations of agents to rooms under the assumption that agents have diversity preferences [Bredereck et al., 2019]: each agent belongs to one of the two types (e.g., juniors and seniors, artists and engineers), and agents' preferences over rooms depend solely on the fraction of agents of their own type among their potential roommates. We consider various solution concepts for this setting, such as core and exchange stability, Pareto optimality and envy-freeness. On the negative side, we prove that envy-free, core stable or (strongly) exchange stable outcomes may fail to exist and that the associated decision problems are NP-complete. On the positive side, we show that these problems are in FPT with respect to the room size, which is not the case for the general stable roommate problem. Moreover, for the classic setting with rooms of size two, we present a linear-time algorithm that computes an outcome that is core and exchange stable as well as Pareto optimal. Many of our results for the stable roommate problem extend to the stable marriage problem.

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