Data Archive


Errata Notice

On May 8, 2015 the ARDA added ISO (or International Organization for Standardization) country codes to many of our cross-national files to assist users merging the files with other data sources. We recently discovered that incorrect values were given to three nations for one variable and two nations for another variable. We corrected these values on November 2, 2017.

Corrections were made to two variables: ISO 3-alpha (ISO3), a three-letter alpha country code, and to Numeric ISO (NUMISO), a three-digit numeric country code. Each of these variables is used to represent countries, dependent territories, and special areas of geographic interest. The table below offers the corrected values for each of these variables.

Errata Data Table

The following files had the incorrect values from May 8, 2015 to November 2, 2017.

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