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arXiv 2109.12974cs.GTcs.LGecon.TH
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双边贸易:遗憾最小化视角

Bilateral Trade: A Regret Minimization Perspective

Università degli Studi di Milano(米兰大学);Toulouse School of Economics (TSE)(图卢兹经济学院);Artificial and Natural Intelligence Toulouse Institute (ANITI)(图卢兹人工与自然智能研究所);Istituto Italiano di Tecnologia(意大利理工学院);Sapienza Università di Roma(罗马一大(罗马智慧大学))

Nicolò Cesa-Bianchi, Tommaso Cesari, Roberto Colomboni, Federico Fusco, Stefano Leonardi

摘要:

双边贸易是经济学中的一个基本话题,它模拟了两个战略代理人(卖方和买方)之间的中介问题,这两个战略代理人愿意交易他们持有私人估值的商品。在本文中,我们投在$T$轮的卖方/买方互动的后悔最小化框架的双边贸易问题,没有事先知道他们的私人估值。我们的主要贡献是一个完整的表征后悔制度的固定价格机制与不同的反馈模型和私人估值,作为基准的最佳固定价格在事后。更准确地说,我们证明了以下关于遗憾的严格界限:-对于全反馈的$Θ(\sqrt{T})$(即,直接揭示机制)。- $Θ(T^{2/3})$用于现实反馈(即,定价机制)和独立的卖方/买方估值与有界密度。- $Θ(T)$提供真实的反馈和卖方/买方估价,密度有限。- $Θ(T)$提供真实的反馈和独立的卖方/买方估价。- $Θ(T)$用于对抗性设置。

英文摘要:

Bilateral trade, a fundamental topic in economics, models the problem of intermediating between two strategic agents, a seller and a buyer, willing to trade a good for which they hold private valuations. In this paper, we cast the bilateral trade problem in a regret minimization framework over $T$ rounds of seller/buyer interactions, with no prior knowledge on their private valuations. Our main contribution is a complete characterization of the regret regimes for fixed-price mechanisms with different feedback models and private valuations, using as a benchmark the best fixed-price in hindsight. More precisely, we prove the following tight bounds on the regret: - $Θ(\sqrt{T})$ for full-feedback (i.e., direct revelation mechanisms). - $Θ(T^{2/3})$ for realistic feedback (i.e., posted-price mechanisms) and independent seller/buyer valuations with bounded densities. - $Θ(T)$ for realistic feedback and seller/buyer valuations with bounded densities. - $Θ(T)$ for realistic feedback and independent seller/buyer valuations. - $Θ(T)$ for the adversarial setting.

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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