Sociologists Peterson and Berger (1975; henceforth PB Anderson et. al. 1980). In fact, Peterson and Berger's work was mentioned by Douglas Greer, an expert witness in Federal Trade Commission v. Warner Communications Inc. (1984, U.S. District Court, Central District, CA), as evidence that a proposed merger between Warner and Polygram would have deleterious effects on consumer welfare because the merger would result in higher industry concentration and hence less product diversity.
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Peter J. Alexander (1996) studied this question.
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