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arXiv 0906.4764cs.GTcs.MA
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基于合作博弈的搜索拍卖竞价优化算法

A Novel Bid Optimizer for Sponsored Search Auctions based on Cooperative Game Theory

Sriram Somanchi, Chaitanya Nittala, Narahari Yadati

摘要:

在本文中,我们提出了一个出价优化赞助关键字搜索拍卖,从而导致更好地保留广告客户产生有吸引力的实用程序的广告客户,而不会减少收入的搜索引擎。出价优化器被定位为搜索引擎提供给广告商的关键增值工具。建议的出价优化算法转换成一个相关的出价配置文件使用合作博弈论的许多想法的广告客户的关键字的报告值。该算法是基于一个特征形式的游戏,涉及搜索引擎和广告客户。纳什讨价还价理论的思想被用来制定的特点形式的游戏,提供一个公平的份额盈余之间的参与者。该算法然后计算的核仁的特征形式的游戏,因为我们发现,核仁是一个适当的方式分配之间的合作收益的搜索引擎和广告客户。该算法接下来使用线性规划公式将核仁转换成相关的出价概况。该投标简档被输入到标准的通用第二价格机制(GSP),用于确定赞助时段的分配和获胜者要支付的价格。我们所确定的相关出价曲线是一个局部的无嫉妒均衡,也是一个相关的基本博弈均衡。通过详细的模拟实验,我们表明,建议的出价优化保留更多的客户比一个普通的GSP机制,也产生更好的长期效用的搜索引擎和广告客户。

英文摘要:

In this paper, we propose a bid optimizer for sponsored keyword search auctions which leads to better retention of advertisers by yielding attractive utilities to the advertisers without decreasing the revenue to the search engine. The bid optimizer is positioned as a key value added tool the search engine provides to the advertisers. The proposed bid optimizer algorithm transforms the reported values of the advertisers for a keyword into a correlated bid profile using many ideas from cooperative game theory. The algorithm is based on a characteristic form game involving the search engine and the advertisers. Ideas from Nash bargaining theory are used in formulating the characteristic form game to provide for a fair share of surplus among the players involved. The algorithm then computes the nucleolus of the characteristic form game since we find that the nucleolus is an apt way of allocating the gains of cooperation among the search engine and the advertisers. The algorithm next transforms the nucleolus into a correlated bid profile using a linear programming formulation. This bid profile is input to a standard generalized second price mechanism (GSP) for determining the allocation of sponsored slots and the prices to be be paid by the winners. The correlated bid profile that we determine is a locally envy-free equilibrium and also a correlated equilibrium of the underlying game. Through detailed simulation experiments, we show that the proposed bid optimizer retains more customers than a plain GSP mechanism and also yields better long-run utilities to the search engine and the advertisers.

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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