0.15 Robert B. Ekelund_ Jr.George S. Ford Thomas Koutsky, Market Power in Radio Markets: An Empirical Analysis of Local and National Concentration, Journal of Law and Economics, 2000.

{ variable coefficient model regression }	0.18
{ market competition price monopoly }	0.17
{ station program time network }	0.15
{ license spectrum auction radio }	0.11

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