 Complementary bidding and cartel detection: Evidence from Nordic asphalt marketsAapo Aaltio, Riku Buri, Antto Jokelainen and Johan Lundberg International Journal of Industrial Organization, 2025, vol. 98, issue C Abstract: A key challenge in cartel enforcement is identifying collusive agreements. We study two major Nordic procurement cartels that operated in the asphalt paving market. We find evidence that during the cartel period bids were clustered and the winning bid was isolated. We implement two cartel detection methods that exploit variation in the distribution of bids. The method developed by Clark et al. (forthcoming) correctly rejects competitive bidding for the cartel period in both markets. The method suggested by Huber and Imhof (2019) achieves a high prediction rate in one of the markets but not in the market where the cartel had a more modest impact on bid distribution. Our results suggest that statistical screening methods with low data requirements can be useful for competition authorities in detecting collusive agreements. Keywords: Procurement; Bidding ring; Collusion; Antitrust; Complementary bidding; Detection (search for similar items in EconPapers) Downloads: (external link) Related works: Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text Persistent link: https://EconPapers.repec.org/RePEc:eee:indorg:v:98:y:2025:i:c:s0167718724000845 DOI: 10.1016/j.ijindorg.2024.103129 Access Statistics for this article International Journal of Industrial Organization is currently edited by P. Bajari, B. Caillaud and N. Gandal More articles in International Journal of Industrial Organization from Elsevier |
Is your work missing from RePEc? Here is how to contribute.
Questions or problems? Check the EconPapers FAQ or send mail to .
EconPapers is hosted by the
School of Business at Örebro University.