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arXiv 1909.07313cs.GTcs.DS
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求解强替代品产品组合拍卖

Solving Strong-Substitutes Product-Mix Auctions

Elizabeth Baldwin, Paul W. Goldberg, Paul Klemperer, Edwin Lock

AI总结:

本文针对强替代品产品组合拍卖,利用投标语言和次模最小化方法计算均衡价格,并提出迭代约束匹配算法解决分配问题,实验证明其机制实用有效。

摘要:

本文开发了求解强替代品产品组合拍卖的算法。也就是说,它为那些使用该拍卖的投标语言来真实表达其强替代品偏好的智能体寻找竞争性均衡价格和数量,这些偏好涉及任意数量的商品,且每种商品都有多个离散单位可供选择。(强替代品偏好在其他文献中也称为 M^♮-凹映射、拟阵映射、良分层映射以及赋值拟阵。)我们对投标语言及其所提供信息的利用,与依赖估值或需求预言机来寻找均衡的现有算法形成对比。我们使用应用现有次模最小化方法的算法来计算市场出清价格。在这些价格下将供给分配给竞标者,则需要求解一个新的约束匹配问题。我们的算法迭代地简化分配问题,通过扰动投标和价格来解决由可在多种商品上被接受的投标所产生的平局打破选择问题。我们给出了价格寻找和分配的实用运行时间界限,并通过实验说明我们的分配机制具有实用性。

英文摘要:

This paper develops algorithms to solve strong-substitutes product-mix auctions. That is, it finds competitive equilibrium prices and quantities for agents who use this auction's bidding language to truthfully express their strong-substitutes preferences over an arbitrary number of goods, each of which is available in multiple discrete units. (Strong substitutes preferences are also known, in other literatures, as $M^\natural$-concave, matroidal and well-layered maps, and valuated matroids). Our use of the bidding language, and the information it provides, contrasts with existing algorithms that rely on access to a valuation or demand oracle to find equilibrium. We compute market-clearing prices using algorithms that apply existing submodular minimisation methods. Allocating the supply among the bidders at these prices then requires solving a novel constrained matching problem. Our algorithm iteratively simplifies the allocation problem, perturbing bids and prices in a way that resolves tie-breaking choices created by bids that can be accepted on more than one good. We provide practical running time bounds on both price-finding and allocation, and illustrate experimentally that our allocation mechanism is practical.

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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