Although observers of the Pakistani economy are well aware that a small number of family groups, popularly called ""the twenty-two families,"" dominates the industrial structure of the country, the actual effects of this concentration of economic power on income distribution and on other areas...

In this paper I assemble and array two rarely used data sets to measure the extent ofaggregate concentration the share of national economic activity accounted for by the largest X companies in the U.S. in the 1980s and 1990s. The data show clearly that, despite the substantial merger wave of the...