it's really important to understand the competitiveness of an industry, both before and after. There are several ways to judge this, but a common tool is the Herfindahl-Hirschman Index (HHI).

The HHI value can range anywhere from near 0 ... The Herfindahl-Hirschman index is a convenient way to measure the competitiveness in an industry or market sector. Although it is computationally ...

The DOJ uses HHI as a measure of competition The DOJ uses the Herfindahl-Hirschman Index (HHI ... “Industry C” scores 900. Chart 1: Competitiveness changes based on the number of firms ...