20. 11. 2003The Herfindahl-Hirschman Index (HHI) measures market concentration and is used to determine market competitiveness.
What Does the Herfindahl-Hirschman Index (HHI) Mean?The Herfindahl-Hirschman Index (HHI) is a common measure of market concentration and is used to determine market competitiveness, often pre- and post-merger and acquisition (M&A) transactions. The closer a market is to a monopoly, the higher the market's concentration and the lower its competition.How Do I Interpret the Herfindahl-Hirschman Index (HHI)?A market with an HHI below 1,500 is considered a competitive marketplace. An HHI of 1,500 to 2,500 is moderately concentrated and an HHI of 2,500 or greater is highly concentrated. Mergers that increase the HHI by more than 200 points in highly concentrated markets generally raise antitrust concerns because they're assumed to enhance market power.What Is the Main Advantage of the Herfindahl-Hirschman Index (HHI)?The primary advantage of the HHI is the simplicity of the calculation and the small amount of data that are required for the calculation. Firms are also weighted according to their size, which makes the HHI superior to other measures like the concentration ratio.
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URL encoding, officially known as percent-encoding, is a method to encode arbitrary data in a uniform resource identifier (URI) using only the US-Ascii characters legal within a URI.
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Methods and apparatus are disclosed to determine informed holdouts for an advertisement campaign. An example storage medium includes instructions that, when executed, cause a machine to retrieve user identifiers associated with purchase…