Recently, the Federal Communications Commission and the Department of Justice have imposed detailed regulatory schemes governing the contractual relationship between the commercial television networks and program suppliers. This article provides empirical evidence on the determinants of program...

This paper examines the relationships among radio station listenership, the number of program formats, and the number of stations. These relationships are statistically significant and consistent with theory, but the interrelationships are numerically small. The results imply that proposals by...