Abstract
We establish nonparametric identification of auction models with continuous and nonseparable unobserved heterogeneity using three consecutive order statistics of bids. We then propose sieve maximum likelihood estimators for the joint distribution of the unobserved heterogeneity and the private value, as well as their conditional and marginal distributions. Lastly, we apply our methodology to a novel dataset from judicial auctions in China. Our estimates suggest substantial gains from accounting for unobserved heterogeneity when setting reserve prices. We propose a simple scheme that achieves nearly optimal revenue by using the appraisal value as the reserve price.
Funding Statement
The first author was supported by Social Sciences and Humanities Research Council (SSHRC) 430-2023-00061.
The second author was supported in part by the Discovery grant (RGPIN-2020-04602) from the Natural Sciences and Engineering Research Council of Canada (NSERC).
Acknowledgments
The authors would like to thank the anonymous referees, an Associate Editor and the Editor for their constructive comments that improved the quality of this paper.
Citation
Yao Luo. Peijun Sang. Ruli Xiao. "Order statistics approaches to unobserved heterogeneity in auctions." Electron. J. Statist. 18 (1) 2477 - 2530, 2024. https://doi.org/10.1214/24-EJS2258
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