Location Trends of Large Company Headquarters During the 1990s
This article documents changes in the spatial distribution of corporate headquarters of large U.S.-domiciled corporations during the 1990s. The authors find that the largest metropolitan areas continue to host a disproportionate share of headquarters, but there have been significant shifts toward cities with population between one and two million.
Link
http://www.chicagofed.org/publications/economicperspectives/2002/2qepart2.pdf