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Abstract
The paper is devoted to a case of a cartel in Polish cement industry. Short description of the
industry and characteristics of the cartel with its fundamental illegal practices, market sharing and
price fixing have been done. We focused on examination of possibility of detection of a cartellike
behavior of players in an industry on a basis of cartel markers’ evaluation, using statistical
data we can actually obtain. On a basis of examination of market shares of players and
price/supply processes we found distinctive, theoretically motivated patterns characteristic for
collusive equilibrium in an industry.