TY  - BOOK
AU  - Dertouzos,James N.
AU  - Trautman,William B.
ED  - Research and Development Corporation, 
TI  - Economic effects of media concentration: estimates from a model of the newspaper firm 
T2  - The Rand paper series
PY  - 1990///
CY  - Santa Monica, California
PB  - Rand Corporation
KW  - Mass media
KW  - Economic aspects
KW  - United States
KW  - Freedom of speech
N1  - Includes bibliographical references: page 20
ER  -