Professor of Decision Sciences
DS151007; Multi-Unit Auctions; Sequential Auctions; Uniform-Price Auction; Affiliated Values; Information Revelation;
The authors study sequential and single-round uniform-price auctions with affiliated values. The authors derive symmetric equilibrium for the auction in which k1 objects are sold in the first round and k2 in the second round, with and without revelation of the first-round winning bids.The authors demonstrate that auctioning objects in sequence generates a lowballing effect that reduces the first-round price. Total revenue is greater in a single-round, uniform auction for k = k1 + k2 objects than in a sequential uniform auction with no bid announcement.When the first-round winning bids are announced, the authors also identify a positive informational effect on the second-round price. Total expected revenue in a sequential uniform auction with winning-bids announcement may be greater or smaller than in a single-round uniform auction, depending on the model’s parameters.