Since 2017 | World Inequality Database |

WID.world combines different data sources: national accounts, survey data, fiscal data, and wealth rankings. By doing so, it becomes possible to track more precisely the evolution of all income or wealth levels, from the bottom to the top. The key novelty of WID.world is to use such data in a systematic manner, allowing comparisons between countries and over long time periods. In order to achieve this objective, WID build upon the new wave of research on long-run inequality trends developed during the past 15 years by an international group of scholars.