Thomas Piketty

Quand la France invente la ségrégation extrême, financée par l'argent public: la part des enfants de 6e scolarisés dans le privé atteint 39% à Paris en 2025, avec des écarts hallucinants entre classes sociales
www.lemonde.fr/societe/arti...

New working paper: Prosperity within Limits? Planetary Habitability, Global Convergence & Structural Transformation 2026-2100 wid.world/news-article...

More to come in the Global Justice Report to be released at the World Inequality Conference Paris June 4-6 2026 inequalitylab.world/en/event/wor...

Skin Tone Penalties: Quasi-Experimental Evidence on Colorism in Football - WID - World Inequality Database This paper studies skin tone discrimination in men’s professional football by comparing shots that narrowly score with those that narrowly miss the goal.

📝New research by @billywoom.bsky.social and @doniakamel.bsky.social uncovers how skin tone shapes player recognition in professional #football — even when performance is identical⚽️

These biases translate into lower market valuations for darker-skinned players.

Read more ▶️ wid.world/news-article...

Europe, a social-democratic power To assert itself on the world stage, Europe first has to take pride in what it has become since 1945: a democratic, social and transnational power. European countries, which had long been fierce ri…

To win the cultural and intellectual battle, Europe must now assert its values and defend its model of development, fundamentally opposed to the nationalist-extractivist model of Trump and Putin
thomaspiketty.wordpress.com/2026/02/03/e...

2025 highlights:

✨ Inequality placed on the agenda of the 𝗚𝟮𝟬 𝘀𝘂𝗺𝗺𝗶𝘁

✨2025 𝗖𝗹𝗶𝗺𝗮𝘁𝗲 𝗜𝗻𝗲𝗾𝘂𝗮𝗹𝗶𝘁𝘆 𝗥𝗲𝗽𝗼𝗿𝘁 published in October

✨2026 𝗪𝗼𝗿𝗹𝗱 𝗜𝗻𝗲𝗾𝘂𝗮𝗹𝗶𝘁𝘆 𝗥𝗲𝗽𝗼𝗿𝘁 published in December

✨27 Working Papers authored by 78 researchers

...and more!

📖 Flip through our report heyzine.com/flip-book/22...

To make the most of the World Inequality Database, consult the DINA Guidelines and other resources: wid.world/methodology/

This 3rd edition includes improved or new:
🔹macro aggregates
🔹income and wealth definitions
🔹data-quality flags
🔹sections on wealth distribution and gender inequality

Un débat essentiel pour reprendre la main sur l’énergie ⚡

🗣️ Avec @lucaschancel.bsky.social et Anne Debrégeas
🎙️Animé par @jadelindgaard.bsky.social
📅 Jeudi 29 janvier, 19h

Entrée libre. Inscription conseillée ▶️ inequalitylab.world/fr/event/a-l...

@attac.org

Le décrochage européen est plus une histoire de ralentissement que de point de non retour. La suite dans ma tribune @lemonde.fr fondée sur nos travaux du @wid.world
où nous discutons tendances historiques avec R. Loubes, @thomaspiketty.bsky.social et A.-S. Robillard: www.lemonde.fr/idees/articl...

Mapping The Redistributive Debates In Norway And The United States - WID - World Inequality Database Mapping The Redistributive Debates In Norway And The United States This paper studies pro-redistributive arguments in legislative debates in the U.S. Congress and the Norwegian Storting from 2015 to 2...

How do people argue for redistribution in Norway 🇳🇴 vs the U.S. 🇺🇸?

Do debates lean more on emotional fairness arguments or analytical externality arguments?

And what type of argument convinces who?

New study by @mortenstostad.bsky.social, M. Lobeck & C. de Meulenaer ▶️ wid.world/news-article...

New EQUALS episode is out ft @thomaspiketty.bsky.social

Financial flows to north from south now exceed 1% of global GDP — more than all development aid.

Piketty explains how debt & reserve currencies favor the North and what could actually change it.
🎧 Tune in: www.equals.ink/p/the-great-...

Project 2025, from nightmare to reality The year 2025 was marked by the Trump shock: an unprecedented wave of extreme brutality, unapologetic nationalism, and unrestrained extractivism that shook the world as never before since 1945. To …

To better understand what made the Trump shock possible, and how to confront it in the future, we must turn to its roots, namely, to Project 2025
thomaspiketty.wordpress.com/2025/12/16/p...

Thank you to all WID fellows for their inputs, and in particular to @ricardo-eco.bsky.social, who wrote and coordinated the report, as well @lucaschancel.bsky.social & @rowaida96.bsky.social who edited it.

This report benefited from the support of the @undp.org and the European Union.

Home - WID - World Inequality Database Home The source for global inequality data. Open access, high quality wealth and income inequality data developed by an international academic consortium.

Building on the 2018 and 2022 editions, the #WIR2026 draws on the contributions of over 200 scholars from all over the world affiliated with the World Inequality Lab and contributing to the World Inequality Database wid.world - the largest database on the historical evolution of global inequality.

You can read the World Inequality Report 2026 in 10 different languages: English, Arabic, Chinese, French, German, Hindi, Portugese, Spanish, Russian, and Thai
wir2026.wid.world/download/

World Inequality Report 2026 The World Inequality Report 2026 offers the most up-to-date synthesis of international research efforts to track global inequalities.

The 3rd edition of our World Inequality Report is prefaced by @josephestiglitz.bsky.social & Jayati Ghosh.

It comes at a challenging political time, but is more essential than ever to continue the historic movement toward equality.

Explore the report ▶️ wir2026.wid.world

YouTube video by World Inequality Lab World Inequality Report 2026

Today, we are publishing our World Inequality Report, which reviews the most recent #inequalitydata and exposes the magnitude of #inequality across time, space and all its dimensions.

👇Share this thread, share the report!
www.youtube.com/watch?v=R67u...

📰 En Une du @lemonde.fr aujourd'hui :

"L'extrême concentration des richesses mondiales"

3 article à lire pour découvrir en avant-première Le Rapport sur les inégalités mondiales 2026

www.lemonde.fr/economie/art...

Racial Inequality and Redistribution in Post-Apartheid South Africa - WID - World Inequality Database Racial Inequality and Redistribution in Post-Apartheid South Africa The source for global inequality data. Open access, high quality wealth and income inequality data developed by an international aca...

South Africa remains the most unequal country in the world, with the top 10% earning 70% of all pretax income.

New study by A. Gethin & L. Czajka shows that inequality in 2019 was as high as in 1993.

Racial inequality reduced only because top 10% Black incomes surged.

▶️ wid.world/news-article...

🟢 Climate change hits the poorest the hardest shows *Chapter 2.1 of the 2025 #ClimateInequality Report*

⚠️The bottom 50% wil bear ¾ of all income losses from climate change by 2050.

Read more in the report 🔗 wid.world/news-article...

🎴NEW PAPER!🎴

Majorities in 11 HICs support:
✅Foreign aid
✅Debt relief for low-income countries (LICs)
✅An international carbon price financing a worldwide basic income
✅An international 2% tax on wealth above $1 million with 30% funding LICs
and much more.

bsky.app/profile/wid....
A 🧵⬇️

🔴 Over 500 economists, including WIL co-director @thomaspiketty.bsky.social, call on world leaders to set up an International Panel on Inequality, as recommended by the Extraordinary Committee's report to the #G20, led by @josephestiglitz.bsky.social

🔗Letter www.equals.ink/p/sign-on-le...

Le Pen’s RN has become the party of billionaires How can France break out of its political deadlock? First, by accepting the idea that democracy requires clear and accepted transfers of power to function properly. Always keeping the same people i…

Le Pen’s RN has become the party of billionaires
By voting to save the ultra-rich, the RN has clearly positioned itself as the party of billionaires, as a right-wing party on every level, much like Trump’s Republican Party
thomaspiketty.wordpress.com/2025/11/11/l...

Very important read ahead of #cop30 👇

The 2025 #ClimateInequality Report brings together pioneering research conducted by @wid.world and universities worldwide and was edited by @lucaschancel.bsky.social & @cmohren.bsky.social with inputs from @pbothe.bsky.social @stellamuti.bsky.social

Thx @wid.world's team and fellows!

Over the past 25 years, 200+ researchers worldwide have contributed to the World Inequality Database. While these data remain imperfect and provisional, the global picture of long-term changes in income and wealth distributions is now well established.
(9/9)

Global Justice Project - World Inequality Lab The Global Justice Project (GJP) aims to provide a platform to stimulate research, policymaking, and citizen engagement to shape a fairer, more democratic and sustainable 21st century.

(8/9)
Our interpretation of these long-run findings is that the rise of inclusive, social-democratic institutions has been central to achieving both greater equality and higher prosperity.

More findings coming in the #GlobalJusticeProject, June 2026.
inequalitylab.world/en/global-ju...

7/9
If we look at wealth inequality, we see that it has always been extremely high, with the bottom 50% holding only a tiny share of total wealth. Despite this, there has been a significant long-run movement toward greater wealth equality in rich countries, particularly in Western and Nordic Europe.

(6/9)
Our study compares Europe and the United States and challenges the widespread belief that rising inequality in the US since the 1980s has fueled innovation and productivity, especially in high-tech sectors. In fact, we find the opposite.

(5/9)
If we take Nordic Europe (1990)as a benchmark for equality, and aim even higher, we can envision a world where the gap between top and bottom incomes falls to 3–5× by 2100, versus 50-160 today.

(4/9)
Other inequality indicators tell the same story.

A century ago, the richest 0.1% earned 150–250× more than low-income earners in Europe. Today, that gap is down to 8–15× in Sweden, Denmark, Norway & the Netherlands — and 15–20× in Germany, France & Britain.

A striking drop in inequality.

3/9 All rich countries—especially in Western and Nordic Europe—have undergone an enormous compression of income scales during the 20th century, while becoming significantly more productive.In Nordic Europe, the bottom posttax 50% share rose from little more than 15% in 1910 to almost 40% in 1980-90.