How it works: One generally accepted way of measuring concentration is to look at the Herfindahl-Hirschman Index, or HHI, more familiar from its use in antitrust enforcement. HHI takes a sum-of ...

banking concentration can be approximated by the concentration ratio—the share of assets held by the k largest banks (typically three or five) in a given economy—or the Herfindahl-Hirschman index (HHI ...

The Herfindahl-Hirschman Index, or HHI, looks at the market concentration in an industry to determine if the industry provides healthy competition or is veering close to being a monopoly.

The index with a value between 0 and 1 shows the degree of geographical concentration of the international goods trade. It is also known as the Herfindahl-Hirschman Index (HHI). The index is ...