In this paper we study antitrust intervention in long-term relationships between public procurer and his preferred supplier in one of the Russian regions. We presume that antitrust control of auctions held by affiliated procurer increases the risks of implementing long-term relationships with...

This paper proposes a method of bid-rigging detection, which allows us to reveal cartels in procurement auctions without any prior knowledge of the market structure. We apply it to data on highway construction procurements in one of the Russian regions and show that five suppliers demonstrated...