Clustered Bids in First-Price Auctions: Collusion or Competition?
Refereed Journal // 2023Clustering of the two most competitive bids in first-price auctions can be indicative of collusive behavior. However, it can also reflect non-cooperative strategies under complete information. I propose a simple procedure to distinguish between the two observationally equivalent explanations. This method requires the knowledge of winning bids and the determinants of the bid of the second most competitive bidder.