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- Herfindahl_index abstract "The Herfindahl index (also known as Herfindahl–Hirschman Index, or HHI) is a measure of the size of firms in relation to the industry and an indicator of the amount of competition among them. Named after economists Orris C. Herfindahl and Albert O. Hirschman, it is an economic concept widely applied in competition law, antitrust and also technology management. It is defined as the sum of the squares of the market shares of the 50 largest firms (or summed over all the firms if there are fewer than 50) within the industry, where the market shares are expressed as fractions. The result is proportional to the average market share, weighted by market share. As such, it can range from 0 to 1.0, moving from a huge number of very small firms to a single monopolistic producer. Increases in the Herfindahl index generally indicate a decrease in competition and an increase of market power, whereas decreases indicate the opposite. Alternatively, if whole percentages are used, the index ranges from 0 to 10,000 "points". For example, an index of .25 is the same as 2,500 points.The major benefit of the Herfindahl index in relationship to such measures as the concentration ratio is that it gives more weight to larger firms.The measure is essentially equivalent to the Simpson diversity index used in ecology and to the inverse participation ratio (IPR) in physics.".
- Herfindahl_index wikiPageExternalLink wits.worldbank.org.
- Herfindahl_index wikiPageExternalLink hmg-2010.html.
- Herfindahl_index wikiPageExternalLink herfindahl.htm.
- Herfindahl_index wikiPageExternalLink hhi.htm.
- Herfindahl_index wikiPageID "162841".
- Herfindahl_index wikiPageRevisionID "601809929".
- Herfindahl_index hasPhotoCollection Herfindahl_index.
- Herfindahl_index subject Category:Econometrics.
- Herfindahl_index subject Category:Imperfect_competition.
- Herfindahl_index subject Category:Microeconomics.
- Herfindahl_index subject Category:Monopoly_(economics).
- Herfindahl_index comment "The Herfindahl index (also known as Herfindahl–Hirschman Index, or HHI) is a measure of the size of firms in relation to the industry and an indicator of the amount of competition among them. Named after economists Orris C. Herfindahl and Albert O. Hirschman, it is an economic concept widely applied in competition law, antitrust and also technology management.".
- Herfindahl_index label "Herfindahl index".
- Herfindahl_index label "Herfindahl-Index".
- Herfindahl_index label "Herfindahl-index".
- Herfindahl_index label "Indice de Herfindahl-Hirschmann".
- Herfindahl_index label "Indice di concentrazione".
- Herfindahl_index label "Wskaźnik Herfindahla-Hirschmana".
- Herfindahl_index label "Índice de Herfindahl".
- Herfindahl_index label "Индекс Херфиндаля".
- Herfindahl_index label "ハーフィンダール・ハーシュマン・インデックス".
- Herfindahl_index sameAs Herfindahl-Index.
- Herfindahl_index sameAs Índice_de_Herfindahl.
- Herfindahl_index sameAs Herfindahl_adierazlea.
- Herfindahl_index sameAs Indice_de_Herfindahl-Hirschmann.
- Herfindahl_index sameAs Indice_di_concentrazione.
- Herfindahl_index sameAs ハーフィンダール・ハーシュマン・インデックス.
- Herfindahl_index sameAs Herfindahl-index.
- Herfindahl_index sameAs Wskaźnik_Herfindahla-Hirschmana.
- Herfindahl_index sameAs m.015mnb.
- Herfindahl_index sameAs Q370089.
- Herfindahl_index sameAs Q370089.
- Herfindahl_index wasDerivedFrom Herfindahl_index?oldid=601809929.
- Herfindahl_index isPrimaryTopicOf Herfindahl_index.