Our central argument is that precision in defining this central concept in antitrust law and policy could be achieved by treating monopoly power and market power as qualitatively identical but recognizing explicitly that anticompetitive power can be exercised by either of two methods raising ones own prices or raising competitors costs. Market power is a key concept in antitrust law a finding of monopolization in violation of section 2 of the sherman act1 requires an initial determination that the defendant has mo nopoly power a high degree of market power a lesser but still significant market power requirement is imposed in at. The market concept in antitrust law dec 24 2020 posted by patricia cornwell media text id c35638aa online pdf ebook epub library the market concept in antitrust law introduction 1 the market concept book the market concept in antitrust law uploaded by patricia cornwell that the role that market definition provides in antitrust cases is sort of a dual role the. The relevant market concept in the courts us antitrust courts have relied on economic thinking for well nigh a century and did so long before this reliance became openly visible over the last decades 71 when delineating the relevant antitrust market the us supreme court has referred to concepts such as cross elasticities of demand 72 a notion that the court borrowed from economics