Along with the main dataset, UNU-WIDER provides a WIID Companion, which consists of two companion datasets. One of these reports inequality data by country and the other reports inequality data globally, including the global distribution.
These datasets offer a more user-friendly, curated set of inequality statistics with most of the necessary data selection and adjustment needed to analyse, describe, or compare levels of inequality between countries or over time has already been taken care of by our inequality and data experts.
The WIID Companion reports annual country and global per capita income distributions at the percentile level. It also includes a set of measures that summarize the distribution, including relative and absolute inequality indices and various income share ratios. Thus, the WIID Companion represents trends in the income distribution within countries, between countries, and globally to improve the study of income inequalities and contribute to better monitoring of inequality trends. The WIID Companion datasets are now directly accessible in real time through our WIID Explorer, a powerful tool for accessing and analysing the most comprehensive collection of comparable income inequality statistics in the world.
Resources are available with detailed information on how to use the WIID Companion datasets. There are also three WIDER Technical Notes describing construction of the WIID Companion datasets. For more advanced users, we also provide a Stata file package which can be used to replicate the steps taken in the construction of the WIID Companion.
Please cite this database as UNU-WIDER, World Income Inequality Database (WIID) Companion dataset (wiidcountry and/or wiidglobal). Version 30 June 2022. https://doi.org/10.35188/UNU-WIDER/WIIDcomp-300622
Technical Note: Data Selection
Technical Note: Standardized Series
Technical Note: Global Income Distribution