Free entry into markets with decreasing average costs and differentiated products can result in an inefficient number of firms and suboptimal product variety. Because new firms and products draw their customers in part from existing products, concentration can affect incentives to enter as well...

This chapter surveys the literature on the economics of radio, focusing on the broadcast industry in the United States. The first parts of the chapter provide a history of the radio industry and its regulation, and a guide to the data available for empirical research. The next part surveys the...

Free entry into markets with decreasing average costs and differentiated products can result in an inefficient number of firms and suboptimal product variety. Because new firms and products draw their customers in part from existing products, concentration can affect incentives to enter as well...