The story contins an ecconomist analysis of 893 industries and identifies the market share maintained by the four largest firm within each.6 It found that between 1997 and 2012, two-thirds of industries became more concentrated.7 During this period, The weighted average share of the top four firms in each sector rose from 26 percent to 32 percent.
The story contains an Economist analysis of 893 industries and identifies the market share held by the four largest firms within each.6 It finds that between 1997 and 2012, two-thirds of industries became more concentrated.7 During this period, the weighted average share of the top four firms in each sector rose from 26 percent to 32 percent.