## Herfindahl index range

The Herfindahl Index (H) ranges from 1/N to one, where N is the number of firms in the market. Equivalently, if percents are used as whole numbers, as in 75 instead of 0.75, the index can range up to 100 2 , or 10,000. The Herfindahl-Hirschman Index ranges from 1 (least concentrated) to 10,000 (most concentrated). The 10,000 figure comes from a theoretical scenario where there is only one company operating in the industry, with 100% of the market share. HHI Index can range from 0 to 10,000 if whole percentage numbers are used. Similarly, it can range from 0 to 1, where market shares are used as fractions. E.g. if there’s only one firm operating in an industry, holding 100% market share, it’s respective HHI would be exactly 10,000 or 1 and would indicate a monopoly. Herfindahl Hirschman definition. The HHI index is calculated as the sum of the squares of the market shares of the largest firms in the market. The measure ranges from 0 to 1. Sometimes, however, whole percentages are used in the calculation, in which case the index ranges from 0 to 10,000 points. The Herfindahl index is a commonly used measure for economic concentration. It is also used for portfolio diversification to find out the number of positions in a portfolio. HHI is one of the many economic concepts used to measure market shares. The Herfindahl Index takes into account a number of factors that give analysts and experts a better, more comprehensive view of the health of a specific market. When that market is populated by a lot of big companies, all of them relatively the same size, the index will be at or near zero. The HHI value can range anywhere from near 0 up to 10,000. A higher index value means that the industry is considered to be closer to monopoly conditions.

## These studies use a range of methodologies and data, cover UK and non-UK banks CR = concentration ratios; HHI = Herfindahl-Hirschman Index; L = Lerner

11 Dec 2017 To measure export diversification, the Herfindahl-Hirschman index (HHI) The chosen index results in specific bounds with a range varying of market concentration. The Herfindahl-. Hirschman. Index, the most widely used measure of market of the index ranges between + 1. (forn^2) andi,ie, 3n2~3* contains a proof that this property is also shared by the Herfindahl index. It is also shown that, due to its more stable range, the H index is more versatile with The Herfindahl-Hirschman Index - HHI - is a measure of the size of firms in relation to the The index range: 0 ≤ HHI ≤ 10,000; where 0 is perfectly competitive. It is calculated as follows, where is the market share of the i'th firm competing in the market (and there are such firms):. The HHI can in principle range from close to

### The Herfindahl-Hirschman Index, also called the Herfindahl Index, measures the extent to which market share is concentrated among a few or many companies.

concentration 1) concentration ratio, and 2) Herfindahl-Hirschman Index not challenge a merger that would leave the industry with an HHI in that range. Wallumbilla in Queensland is a major gas supply hub. As a pipeline interconnection point for the Surat-Bowen Basin, it links gas markets in Queensland, South

### Herfindahl index into a measure of diversity, ENP at first glance appears to be an internally valid measure of the range of effective parties in a system. However

5 Aug 2013 You are presuming familiarity with the Herfindahl index, which is close to assuming that the readers of this forum are all some kind of applied 10 Oct 2019 the concentration ratio, the Herfindahl-Hirschman Index (HHI) may decide to be importing sugar alongside their range of products. 30 Jul 2018 Notes: Market concentration was measured using the Herfindahl-Hirschman Index (HHI), which has a range from 0 to 10,000. The HHI was For Herfindahl index, a higher score means a narrower range of diagnoses used. The referral rate units are patients referred per patients seen by the primary

## The Herfindahl Hirschman Index (HHI) is a measurement used to understand the level of competition that exists within a market or industry, as well as give an indication of how the distribution of market share occurs across the companies included in the index.

30 Dec 2008 Andrea Rispoli

The HHI ranges from 0 (least concentrated) to 10,000 (most concentrated). In a hypothetical situation in which the HHI reaches 10,000, there is just one company 35The Herfindahl index (H) ranges from 1/n to 1. A high value of this index implies that the municipality includes a small number of heavily populated 5 Aug 2013 You are presuming familiarity with the Herfindahl index, which is close to assuming that the readers of this forum are all some kind of applied 10 Oct 2019 the concentration ratio, the Herfindahl-Hirschman Index (HHI) may decide to be importing sugar alongside their range of products.