DATASET METADATA
Data Source:
WBG - WITS
WITS is a trade software tool giving access to bilateral trade between countries based on various product classifications, product details, years, and trade flows. It also contains tariff and non-tariff measures as well as analysis tool to calculate effects of tariff reductions. In addition, users have access to two visualization tools. One using the data from the World Development Indicators database in the format of bubble charts and the second using data from the United Nations COMTRADE database in the format of maps.
To access the WITS system, go to http://wits.worldbank.org/wits
The WITS website has links to downloadable documents that will help you understand how World Integrated Trade Solution (WITS) calculates and presents international trade statistics. You can access the links here: https://wits.worldbank.org/methodology.html
For use guidelines, please consult World Bank Group (http://www.worldbank.org/en/about/legal/terms-of-use-for-datasets) or the WITS website (https://wits.worldbank.org/about_wits.html).
This dataset is classified as Public under the Access to Information Classification Policy. Users inside and outside the Bank can access this dataset. This dataset is licensed under CC-BY 4.0.
INDICATOR METADATA
Definition: Hirschman Herfindahl index is a measure of the dispersion of trade value across an exporter's partners. A country with trade (export or import) that is concentrated in a very few markets will have an index value close to 1. Similarly, a country with a perfectly diversified trade portfolio will have an index close to zero.
Date range: 1988-2015
Periodicity: annually
Type of data: Value
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