You can use this quick and simple calculator to determine the value of the Herfindahl-Hirschman Index for a provided list of companies in accordance with their market shares. What is the Herfindahl-Hirschman Index (HHI)? The Herfindahl-Hirschman Index (HHI), is an approach that is commonly use...
Department of Justice, the Federal Trade Commission, and state attorneys general have used the Herfindahl-Hirschman Index (HHI) to measure market concentration for purposes of antitrust enforcement. The HHI of a market is calculated by summing the squares of the percentage market shares held by ...