What's fit to print: The effect of ownership concentration on product variety in daily newspaper markets

This paper examines the effect of ownership concentration on product position, product variety and circulation in the US daily newspaper market. The effects of consolidation in differentiated product markets cannot be determined solely from theory. Because multi-product firms internalize business stealing, mergers may encourage firms to reposition products, leading to more, not less, variety. Using data on the assignment of reporters to topical areas at 706 newspapers in 1993, 1999 and 2004, results show that both differentiation and variety increase with ownership concentration. Moreover, greater concentration increases variety over a range of topics and does not reduce readership.