The dominant view among economists in the field of industrial organization in the 1960s was that industries with a few firms were monopolistic and that this explained why profit rates were higher in concentrated industries than in unconcentrated ones. Harold Demsetz, a former Chicago colleague who moved to UCLA in 1971, dubbed this the “market concentration doctrine.” Brozen, with Demsetz, was a modern-day Schumpeterian who saw a dynamic competitive process at work. In industries in which a few companies had a large market share, they believed, concentration didn’t cause high profits. Rather, concentration and high profits were caused by successful competition. In his 1982 book, Concentration, Mergers, and Public Policy (Macmillan), Brozen weaves together evidence from Demsetz and other economists, along with his own findings, to drive home that point.
Henderson, David R. “In Memoriam: Yale Brozen.” The Freeman 48, no. 6 (June 1998). Posted online at: http://www.libertyhaven.com/thinkers/yalebrozen/memoriam.html