RUDN Journal of LawRUDN Journal of Law2313-23372408-9001Peoples’ Friendship University of Russia named after Patrice Lumumba (RUDN University)5851Main features of monopolistic business practices in MERCOSUR countriesBelikovaK МКафедра гражданского и трудового права; Российский университет дружбы народов; Peoples' Friendship University of Russia-Peoples' Friendship University of Russia150120081515707092016Copyright © 2016, Legal Science2016This article deals with certain aspects of unfair business practices in Southern common market (MERCOSUR) countries. The author pays particular attention to restrictive business practices fixed by collusive agreements and concerted market actions resulting from practical cooperation (both joint and individual). Approaches based on adoption of the rule of reason and rigid criteria of per se are being touched upon.