Herfindahl-Hirschman Index (HHI)
What is the Herfindahl-Hirschman Index (HHI)? The Herfindahl-Hirschman Index is an index that measures the market concentration of an industry. A highly concentrated industry is one where only a few players in the industry hold a large percentage of the market share, leading to a near-monopolistic situation. A low degree of concentration means that the industry is…