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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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Media Ownership and Concentration in America

Eli M. Noam

Oxford University Press

This book investigates whether the American information sector has become more concentrated. To provide an empirical answer, a methodology that is straightforward, simple, and transparent is adopted: the trend of two media concentration indices used in American antitrust enforcement, the so-called Herfindahl-Hirschmann Index (HHI) and the four-firm market share index, the C4. This book looks at the market concentration trends for 100 separate information industries in the United States. Examples for such industries are broadcast television, cable television, film distribution, daily newspapers, Internet service providers, television set makers, microcomputers, local phone service, and cellular mobile providers. For each of these industries, individual firms' revenues in the US market are analyzed and their US market shares in this particular industry are calculated.

Keywords:   United States, information sector, Herfindahl-Hirschmann Index, market share, revenues, media concentration, television, Internet service providers, microcomputers

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