Most communication and culture producing institutions in the United St
ates operate more for commercial than for any other motives. This essa
y examines commercial radio by comparing the day-to-day work routines
in that institutional setting with the principles of a theoretical com
munication model. Commercial radio, of course, does not meet the stand
ards of such a model. By this thought experiment, however, we can illu
minate many peculiarities of the conduct of communication by commercia
l radio, learn more about the application of theoretical models to the
evaluation of practicing institutions, and offer assessments of comme
rcial radio that derive from communication theory, rather than from ec
onomics, law, politics, or business concerns.