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How Efficient are Decentralized Auction Platforms?

机译:分散的拍卖平台有多少?

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摘要

We model a decentralized, dynamic auction market platform in which a continuum of buyers and sellers participate in simultaneous, single-unit auctions each period. Our model accounts for the endogenous entry of agents and the impact of intertemporal optimization on bids. We estimate the structural primitives of our model using Kindle sales on eBay. We find that just over one-third of Kindle auctions on eBay result in an inefficient allocation with deadweight loss amounting to 14% of total possible market surplus. We also find that partial centralization-for example, running half as many 2-unit, uniform-price auctions each day-would eliminate a large fraction of the inefficiency, but yield lower seller revenues. Our results also highlight the importance of understanding platform composition effects-selection of agents into the market-in assessing the implications of market redesign. We also prove that the equilibrium of our model with a continuum of buyers and sellers is an approximate equilibrium of the analogous model with a finite number of agents.
机译:我们建立了一个分散的、动态的拍卖市场平台模型,在这个平台上,买家和卖家在每个时期同时参与单单位拍卖。我们的模型考虑了代理人的内生进入和跨期优化对投标的影响。我们使用eBay上的Kindle销售来评估我们模型的基本结构。我们发现,eBay上超过三分之一的Kindle拍卖会导致分配效率低下,无谓损失占市场总剩余的14%。我们还发现,部分集中化——例如,每天运行一半数量的2单元、统一价格拍卖——将消除很大一部分低效率,但会降低卖家收入。我们的研究结果还强调了理解平台构成效应以及在评估市场重新设计的影响时选择代理进入市场的重要性。我们还证明了我们的模型与一个连续的买家和卖家的均衡是一个近似均衡的类似模型与有限数量的代理人。

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