“…Chamberlin (1954) said counting the number of sellers in an area does not measure competition well. Nevertheless, the measure has been used successfully to gauge the impact of newspaper competition on electoral outcomes (Vermeer, 1992) and diversity of public opinion (Lasorsa, 1991), as well as local television news competition impact on content (Busterna, 1980(Busterna, , 1988 and financial expenditures (Lacy, Atwater, Qin, & Powers, 1988).…”