Macroeconomics
Export Concentration Index Calculator
Calculate a five-category Herfindahl concentration index for exports.
Inputs and results stay in this browser. Currency symbols are illustrative; use any consistent currency.
Understand Export concentration
One idea, three depths
Choose how deeply to explain Export concentration
Export concentration: Calculate a five-category Herfindahl concentration index for exports.
Age 5Explain it to a 5-year-oldStart with a picture
Imagine using Export concentration to answer this question: calculate a five-category herfindahl concentration index for exports? Enter Largest export share, Second export share, Third export share, and 2 other inputs; the calculator shows Export concentration HHI. Try changing one number and watch what happens to Export concentration HHI. The answer tells you Export concentration HHI.
Age 15Explain it to a 15-year-oldConnect it to the formula
A higher index indicates reliance on fewer export categories; the five entered shares may represent products or destination markets. The rule is Export concentration HHI = sum of squared export shares. Its input values are Largest export share (%), Second export share (%), Third export share (%), Fourth export share (%), All remaining exports (%), and the main result is Export concentration HHI. Try changing one number and watch what happens to Export concentration HHI.
CollegeExplain it at college levelState the model precisely
This calculator evaluates a macroeconomics relationship while holding unmodelled conditions constant. The implemented relation is Export concentration HHI = sum of squared export shares, evaluated from Largest export share (%), Second export share (%), Third export share (%), Fourth export share (%), All remaining exports (%) to produce Export concentration HHI. A higher index indicates reliance on fewer export categories; the five entered shares may represent products or destination markets. The result depends on comparable definitions, units, populations and time periods. It estimates a relationship; it does not establish causation or replace current primary data.
The economic question
Calculate a five-category Herfindahl concentration index for exports.
Why this relationship is useful
A higher index indicates reliance on fewer export categories; the five entered shares may represent products or destination markets.
Inputs that must be comparable
- Largest export share (minimum 0, maximum 100) measured in %.
- Second export share (minimum 0, maximum 100) measured in %.
- Third export share (minimum 0, maximum 100) measured in %.
- Fourth export share (minimum 0, maximum 100) measured in %.
- All remaining exports (minimum 0, maximum 100) measured in %.
Use one market, firm, population and time period throughout; mixing definitions can make a correctly calculated number economically meaningless.
The model
Export concentration HHI = sum of squared export shares
From inputs to output
The calculator combines Largest export share, Second export share, Third export share, Fourth export share, All remaining exports and reportsExport concentration HHI together with Largest export share, Effective category count. Change one assumption at a time to identify what actually drives the estimate.
How to read Export concentration HHI
Read the sign, magnitude, unit and period together. The result quantifies the relationship in “calculate a five-category herfindahl concentration index for exports”; it does not by itself prove that one input caused another.
Where interpretation can fail
Do not use the result when the input definitions, units or formula assumptions do not match the real situation. This is an educational model, not financial, investment, tax or policy advice; verify material decisions against primary data and professional guidance.
Supporting sourcesAcademic referencesPrimary standards, textbooks and complete citations
Standards, reading and academic references
Use the calculator as the worked interaction, then consult the primary standards and academic textbooks listed below. MW SysArc links to the original sources; the explanation on this page is original and does not reproduce them.
Principles of Economics 3e
Read the free OpenStax economics textbookCite this book
- APA 7
- Greenlaw, S. A., Shapiro, D., & MacDonald, D. (2022). Principles of economics 3e. OpenStax. https://openstax.org/books/principles-economics-3e/pages/1-introduction
- MLA 9
- Greenlaw, Steven A., et al. Principles of Economics 3e. OpenStax, 2022, https://openstax.org/books/principles-economics-3e/pages/1-introduction.
- Chicago author-date
- Greenlaw, Steven A., David Shapiro, and Daniel MacDonald. 2022. Principles of Economics 3e. Houston, TX: OpenStax. https://openstax.org/books/principles-economics-3e/pages/1-introduction.
OpenStax entries are free to read online. Follow the licence shown on each linked source before redistributing or adapting its content.
Reuse the page responsiblyCite this pageAPA, MLA, Chicago, Harvard, BibTeX and RIS
These formats cite this calculator page itself. They are separate from the academic references above, which support the mathematical method and terminology.
APA 7
MW SysArc. (2026, July 21). Export Concentration Index Calculator. MW SysArc Tools. https://economics.mwsysarc.com/macro/export-concentration-index
MLA 9
MW SysArc. “Export Concentration Index Calculator.” MW SysArc Tools, 21 July 2026, https://economics.mwsysarc.com/macro/export-concentration-index. Accessed 30 Aug. 2026.
Chicago 17
MW SysArc. “Export Concentration Index Calculator.” MW SysArc Tools. Published July 21, 2026. Accessed August 30, 2026. https://economics.mwsysarc.com/macro/export-concentration-index.
Harvard
MW SysArc (2026) ‘Export Concentration Index Calculator’, MW SysArc Tools. Published 21 July 2026. Available at: https://economics.mwsysarc.com/macro/export-concentration-index (Accessed: 30 August 2026).
BibTeX and RIS records
BibTeX
@misc{mwsysarc_export_concentration_index_2026,
author = {{MW SysArc}},
title = {Export Concentration Index Calculator},
howpublished = {MW SysArc Tools},
year = {2026},
url = {https://economics.mwsysarc.com/macro/export-concentration-index},
note = {Published July 21, 2026; accessed August 30, 2026}
}RIS
TY - ELEC
AU - MW SysArc
TI - Export Concentration Index Calculator
T2 - MW SysArc Tools
PY - 2026
DA - 2026-07-21
Y2 - 2026-08-30
UR - https://economics.mwsysarc.com/macro/export-concentration-index
N1 - Published July 21, 2026
ER -Clear answers
Frequently asked questions
What does the Export concentration do?
Calculate a five-category Herfindahl concentration index for exports.
How does the Export concentration work?
The calculator applies this formula: Export concentration HHI = sum of squared export shares. A higher index indicates reliance on fewer export categories; the five entered shares may represent products or destination markets.
What can I learn from the Export concentration?
It helps you explore the relationship described by this tool: Calculate a five-category Herfindahl concentration index for exports. Change one input at a time to observe how it affects the result.
Does MW SysArc receive or store what I enter?
No. The calculation runs locally in your browser. MW SysArc does not receive or store your calculation inputs.
How should I use the result?
Use the result as an estimate or educational aid. Check important financial, business or policy decisions with qualified sources and current data.
Last reviewed . Calculations tested .