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arXiv 1604.04095cs.GT
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搜索拍卖中外部性模型的改进

Towards Better Models of Externalities in Sponsored Search Auctions

Nicola Gatti, Marco Rocco, Paolo Serafino, Carmine Ventre

摘要:

赞助搜索拍卖(SSA)可以说代表了计算机科学和经济学的交叉点上的问题,在现实生活中有着最深的应用。在SSA领域,研究显示一个广告对其他广告的影响,也就是说,经济学中的外部性是最重要的,迄今为止已经引起了许多研究的注意。然而,即使是对问题进行建模的基本问题,到目前为止也没有一个明确的答案。流行的级联模型可以说是过于理想化,真正描述的现象,但它允许一个很好的理解问题。其他模型,相反,描述设置更充分,但太复杂,允许一个令人满意的理论分析。在这项工作中,我们试图得到最好的两种方法:首先,我们定义了一些一般的数学公式的问题,试图有一个丰富的描述在SSA的外部性,其次,证明了主机的结果绘制一个几乎完整的图片的计算复杂性的问题。我们补充这些近似性的结果与一些考虑机制设计在我们的上下文中。

英文摘要:

Sponsored Search Auctions (SSAs) arguably represent the problem at the intersection of computer science and economics with the deepest applications in real life. Within the realm of SSAs, the study of the effects that showing one ad has on the other ads, a.k.a. externalities in economics, is of utmost importance and has so far attracted the attention of much research. However, even the basic question of modeling the problem has so far escaped a definitive answer. The popular cascade model is arguably too idealized to really describe the phenomenon yet it allows a good comprehension of the problem. Other models, instead, describe the setting more adequately but are too complex to permit a satisfactory theoretical analysis. In this work, we attempt to get the best of both approaches: firstly, we define a number of general mathematical formulations for the problem in the attempt to have a rich description of externalities in SSAs and, secondly, prove a host of results drawing a nearly complete picture about the computational complexity of the problem. We complement these approximability results with some considerations about mechanism design in our context.

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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