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Efficiency and information aggregation in large uniform-price auctions

机译:大型统一价格拍卖中的效率和信息汇总

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摘要

We prove that the equilibria of a large interdependent-value, uniform-price auction model where bidders have arbitrary preferences for multiple units can be approximated by a nonatomic exchange economy. We show that the uniform-price auction is approximately efficient with a large number of participants and asymptotically aggregates idiosyncratic bidder information into the market price. More generally our analysis framework provides conditions justifying the use of nonatomic limit model approximations to analyze the large-market behavior of game-theoretic models. We demonstrate continuity requirements on the economic primitives sufficient for the equilibrium strategies of the two models to converge as the number of participants in the finite game approaches infinity.
机译:我们证明,非原子交换经济可以近似一个大型的相互依存价值,统一价格拍卖模型的平衡点,其中投标人对多个单位具有任意偏好。我们表明,在有大量参与者的情况下,均价拍卖大约是有效的,并且渐近地将特有投标者信息汇总到市场价格中。一般而言,我们的分析框架提供了证明使用非原子极限模型近似来分析博弈模型的大市场行为的条件。我们证明了对经济原始性的连续性要求,足以满足两个模型的均衡策略在有限博弈参与者人数接近无穷时收敛的要求。

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