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arXiv 1906.09403cs.GT
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离散价值分布下一价拍卖的贝叶斯纳什均衡

Bayesian Nash Equilibrium in First-Price Auction with Discrete Value Distributions

Weiran Shen, Zihe Wang, Song Zuo

摘要:

第一价格拍卖广泛应用于政府合同和工业拍卖。在本文中,我们考虑离散价值分布的第一价格拍卖的贝叶斯纳什均衡(BNE)。研究了一价拍卖中BNE的特征,并给出了一个计算BNE的算法。此外,我们证明了BNE的存在性和唯一性。在连续值分布的情况下,以前的一些结果不适用于离散值分布的情况。同时,离散情形下的唯一性结果不能由连续情形下的唯一性所隐含。与连续情况不同,我们不需要求解常微分方程,因此不会遭受其中的解误差。实验结果表明,与用连续分布逼近离散分布的方法相比,该算法具有更快的速度和更高的精度。本文的结果是在非对称独立私人价值模型中得到的,该模型假设购买者的价值分布是公知的。

英文摘要:

First price auctions are widely used in government contracts and industrial auctions. In this paper, we consider the Bayesian Nash Equilibrium (BNE) in first price auctions with discrete value distributions. We study the characterization of the BNE in the first price auction and provide an algorithm to compute the BNE at the same time. Moreover, we prove the existence and the uniqueness of the BNE. Some of the previous results in the case of continuous value distributions do not apply to the case of discrete value distributions. In the meanwhile, the uniqueness result in discrete case cannot be implied by the uniqueness property in the continuous case. Unlike in the continuous case, we do not need to solve ordinary differential equations and thus do not suffer from the solution errors therein. Compared to the method of using continuous distributions to approximate discrete ones, our experiments show that our algorithm is both faster and more accurate. The results in this paper are derived in the asymmetric independent private values model, which assumes that the buyers' value distributions are common knowledge.

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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