Flow auctions |
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Authors: | Ilan Kremer Zvi Wiener Eyal Winter |
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Affiliation: | 1.School of Business 655 Knight Way,Stanford University,Stanford,USA;2.School of Business,The Hebrew University,Jerusalem,Israel;3.The Center for the Study of Rationality,The Hebrew University,Jerusalem,Israel |
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Abstract: | Flow goods (like electricity) are sold through auctions in a dynamic framework. An important design question is the frequency of such auctions. We use a simple dynamic auction model in continuous time to answer this question. We focus on the relationship between the persistency of bidders’ valuations and the optimal choice of frequency. If the seller focuses on the equilibrium in which bidders follow a repeated static Nash strategy, then the frequency of auctions should typically increase when persistency declines. However, accounting for the fact that bidders can follow different equilibria that are collusive in nature, the comparative statics are reversed, forcing the seller to reduce the frequency when bidders’ valuations are less persistent. The argument builds on the fact that high frequency auctions are more conducive to collusion among bidders. |
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