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Website and database design

Website designed in 2015-2016 with the collaboration of:

Design & data visualisation: logo-wedodata-x2

(Ben Grillet, François Prosper, Brice Terdjman, Anthony Veyssière)

Database architecture & optimization:logo-lix

(Panagiotis Korvesis, Antonis Skandalis, Konstantinos Skianis, Michalis Vazirgianis)

Project management: Lucas Chancel

IT consultants: Thomas Blanchet, Guillaume Saint-Jacques, David Smadja

Web assistants: Yu Tian, Regina Hung

Frequently asked questions
Frequently Asked Questions (FAQ)

What is 

For more information on and its history, click here.

For more information on the network of researchers, click here.

For more information on methodology, click here.

How to read graphs? 

Click here for help on how to navigate through menus and graphs.

I encounter technical problems on, what should I do? 

First, accept our apologies. Second, you should delete the cache memory of your browser (generally under “settings/history/clear cache”), then close it, and try again. If this does not solve the problem, you may want to try with a different browser. And, finally, send us an email with the description of the issue, and the details of your operative system and browsers versions. Our contact mail is in the website footer, under  the CONTACT US section.


There are already many on line economic data portals, why using 

Over the past decades, the increase in economic inequalities was largely driven by a rise in income and wealth accruing to the top of the distribution. However, household surveys, the data sources traditionally used to observe these dynamics, do not capture these evolution very well. They provide useful information and cover a lot of countries but do not inform adequately on income and wealth levels of the richest individuals. overcomes this limitation by combining different data sources: national accounts, survey data, fiscal data, and wealth rankings. By doing so, it becomes possible to track very precisely the evolution of all income or wealth levels, from the bottom to the top. The key novelty of the project is to use such data in a systematic manner, allowing comparisons between countries and over long time periods.

For more information on what you will find (and will not find) on, click here.

What is the meaning of the economic concepts used on 

We try our best to use economic concepts which are consistent with national accounting (i.e. the system used for measuring the economic activity of a nation) and that can also make sense for the general public. On each graph, users can click on the “?” icon and will find the definition of the concepts at stake.

Users can also use our quick-search glossary to find the definition they want.

How is funded? is entirely funded by public, non-profit actors and personal donations.

For more information on our funders, click here.

If you wish to support us, please click on the DONATE button at the bottom of the funding page.