Balassa-index
The formula which applies in this article is: Balasssa index = (export value of good y from the Netherlands/total Dutch export value) divided by (export value good y from the rest of the EU 28)/total export value rest of the EU 28). An index > 1 (or < 1) means that the Netherlands is more (or less) specialised in export of that particular product than the rest of the EU 28.