Entry Models such as Bresnahan and Reiss(91)[4] can under estimate the effect of competition. If the profitability of marketsis mismeasured, this introduces an positive correlation between unoberserved profitability and the number of firms in a market. Using data on entry and exit patterns in...

Fluctuations in demand cause some plants to exit a market and other to enter.Would eliminating these fluctuations reduce plant turnover? A structural model of entry and exit in concentrated markets is estimatedfor the ready-mix concrete industry, using plant level data from the U.S. Census. The...

In the late 1990s, the Canadian newspaper industry underwent rapid consolidation with a few conglomerates controlling the vast majority of daily papers. Over a 4 year period, about three-fourths of Canada s daily newspapers changed ownership. While the issue re-ceived considerable attention and...