<p>HHI index cannot by definition be <em>on companies</em>. It is the squared sum of market shares of all the companies in a country. So, if you are looking for companies' market shares, you should look at each country individually.</p>

<p>But if you want HHI index <em>on countries</em> (which is a correct way of framing the question) then you can use this WorldBank data: <a href="https://tcdata360.worldbank.org/indicators/hh.mkt" rel="nofollow noreferrer">https://tcdata360.worldbank.org/indicators/hh.mkt</a></p>

CC BY-SA 4.0
2018-05-18T12:00:52.650Z
2018-05-18T12:00:52.650Z
Ravshan S.K.
<p>Where can I find Herfindahl indexes on companies (current or past)? Are there any published lists put out by a research institution?</p>

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2018-05-17T17:20:27.293Z
Also I don't have enough karma to add the correct tags to this question.
Gabriel Fair
<data-request><self-study><industrial-organisation>
Where can I look up a companies Herfindahl index?
Gabriel Fair
# Where can I look up a companies Herfindahl index?

(Asked by: username_0 on 2018-05-17)

Where can I find Herfindahl indexes on companies (current or past)? Are there any published lists put out by a research institution?

**Tags:** data-request, self-study, industrial-organisation
> **Comments:**
> **username_0**: Also I don't have enough karma to add the correct tags to this question.  

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## 1 answers

### Answer by username_1 on 2018-05-18. Score: 1

HHI index cannot by definition be *on companies*. It is the squared sum of market shares of all the companies in a country. So, if you are looking for companies' market shares, you should look at each country individually.

But if you want HHI index *on countries* (which is a correct way of framing the question) then you can use this WorldBank data: <https://tcdata360.worldbank.org/indicators/hh.mkt>


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