Calculate the Balassa Index from a country’s product export, total exports, world product exports, and total world exports to find BI.
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Balassa Index Formula
The Balassa Index, also called the revealed comparative advantage index, compares a product’s share in one country’s exports with that product’s share in world exports.
An equivalent form is:
- BI = Balassa Index
- Eij = export value of product i from country j
- Ej = total export value of country j
- Wi = world export value of product i
- W = total world export value
The calculator divides the product’s share of the country’s exports by the same product’s share of world exports. A value above 1 means the country exports that product more intensively than the world average. A value below 1 means the product is less represented in that country’s export basket than it is globally.
Enter all four export values. Use the same currency, monetary scale, time period and product classification; world totals must include the country. For example, do not mix annual country exports with monthly world exports, or USD values with EUR values.
Balassa Index Interpretation
Use these ranges as general reading guidelines. This descriptive trade indicator does not establish productivity, profitability or future competitiveness. The exact meaning can vary by industry, country size, and data source.
| Balassa Index | Interpretation | What it suggests |
|---|---|---|
| BI < 1 | No revealed comparative advantage | The product has a smaller share in the country’s exports than in world exports. |
| BI = 1 | World-average specialization | The product’s export share matches the global export share. |
| BI > 1 | Revealed comparative advantage | The country is relatively specialized in exporting that product. |
| BI much greater than 1 | Strong export specialization | The product is highly important in the country’s exports compared with the world pattern. |
| Input | Use this type of value | Common issue to avoid |
|---|---|---|
| Eij | Country exports of one product | Using production value instead of export value |
| Ej | Total exports of the same country | Using only exports from the same product category |
| Wi | World exports of the same product | Using a different product classification than Eij |
| W | Total world exports | Using a different year or currency base |
Balassa Index Examples
Example 1: Calculating a BI above 1
Suppose a country exports 500 million of a product, and its total exports are 10,000 million. World exports of that product are 20,000 million, and total world exports are 1,000,000 million.
The Balassa Index is 2.5. The country has a revealed comparative advantage in that product because the result is greater than 1.
Example 2: Calculating a BI below 1
Suppose a country exports 100 million of a product, and its total exports are 20,000 million. World exports of the product are 50,000 million, and total world exports are 1,000,000 million.
The Balassa Index is 0.1. The product is less important in the country’s exports than it is in world exports.
Balassa Index FAQ
What does a Balassa Index greater than 1 mean?
A Balassa Index greater than 1 means the country has a revealed comparative advantage in that product. The product takes up a larger share of that country’s exports than it does in total world exports.
Can the Balassa Index be negative?
No. The Balassa Index should not be negative because it is based on export values, and export values are normally zero or positive. If you get a negative result, one of the inputs is likely incorrect.
What data should you use for the Balassa Index?
Use export values for the same product classification, country, year, and currency. For example, if Eij is based on 2023 exports in USD using a specific HS product code, Wi should use the same year, currency, and product code.
