The 1992 Cable Act requires cable systems to carry local broadcasters.
Noncarriage of local stations may represent an attempt by cable syste
ms to disadvantage rivals, and thereby raise the prices of advertising
and cable service. Alternatively, noncarriage might represent the eff
icient replacement of low-valued channels with more highly-valued prog
ramming. This study attempts to discriminate between these hypotheses
with data on cable carriage decisions. The results support the efficie
ncy hypothesis. Systems selling advertising are less likely to drop lo
cal stations than nonadvertisers. Dropped stations tend to have low au
dience ratings, and tend to originate in a different geographic market
from the system.