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Media Ownership and Concentration in America$
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Eli Noam

Print publication date: 2009

Print ISBN-13: 9780195188523

Published to Oxford Scholarship Online: October 2011

DOI: 10.1093/acprof:oso/9780195188523.001.0001

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Vertical and Cross-Industry Concentration

Vertical and Cross-Industry Concentration

Chapter:
(p.342) 14 Vertical and Cross-Industry Concentration
Source:
Media Ownership and Concentration in America
Author(s):

Eli M. Noam

Publisher:
Oxford University Press
DOI:10.1093/acprof:oso/9780195188523.003.0014

Mergers among content providers, distributors, retail outlets, and technology firms raise questions about vertical integration. The fear is of an extension of market power from one industry to a related one. However, vertical integration may also result in efficiency gains, commonly referred to as synergies. To what extent is the American information sector vertically integrated? And how much more now than twenty years ago? This chapter analyzes market concentration trends for the largest fifty information industry firms, as well as the top twenty-five mass media companies, for the year 1984 and subsequent years. These firms are ranked according to their information sector revenue. All revenues are those in the United States, whether by American or non-American firms. Three measures for vertical integration are described: Participation Index, Sector Share Index, and Company Power Index.

Keywords:   market concentration, vertical integration, mergers, synergies, information sector, mass media, revenues, Participation Index, Sector Share Index, Company Power Index

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