Detecting Cartels Joe Harrington (Johns Hopkins University) Advances in the Economics of Competition Law June 2005 In practice, how are cartels detected? Stainless steel - Buyers complained to the European Commission about the rapid increase in prices.
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Is There a Structural Break in Behavior? (Bajari and Ye, 2003)
Does the Behavior of Suspected Colluding Firms Differ from that of Unsuspected Firms?
Cost shifter: distance between the processing plant and the school district.
A firm’s bid should be increasing in distance.
Competitive firms' bids were found to be increasing in distance.
Bids of all three suspected colluding firms were less sensitive to distance and two of them had their bids decreasing in distance.
Does a Collusive Model Fit the Data Better than a Competitive Model?
Beating a Test for Collusion Competitive Model?
A More Active Role for the Antitrust Authorities: Competitive Model?
Screening for Price-Fixing
Coniurationes Caveant! detection policy?