marketing agencies specialized in bidding in the auctions that are used to sell ad space on the web. We analyze how collusive … (used by Facebook). We find that, despite its well-known susceptibility to collusion, the VCG mechanism outperforms the GSP …

This paper examines bidding in auctions for state highway construction contracts on Long Island in the early 1980s, in … order to determine whether bid rigging occurred. Detection of collusion is possible because of limited participation in the … collusive scheme. The paper looks at differences in behavior between ring members and non-members. In these auctions, collusio …