Thomas Piketty

Upward mobility is primarily driven by labor income but almost never by capital alone - WID - World Inequality Database Upward mobility is primarily driven by labor income but almost never by capital alone This paper studies the dynamics of capital and labor income mobility using high-quality register data from Norway.

Do individuals move ⤴️ or⤵️ the income ladder because of jumps in labor or capital income, or both?

👉Upward mobility is primarily driven by labor income but almost never by capital alone, find @marcoranaldi.bsky.social @joelliambuehler.bsky.social @robertoiacono.org

▶️ wid.world/news-article...

Sciences humaines Énergie et inégalités, Lucas Chancel : Pourquoi l’histoire de l’énergie est-elle intimement liée à celle des inégalités sociales ? Comment penser...

Félicitations @lucaschancel.bsky.social pour ce livre magnifique

Il est impossible de faire face à nos défis climatiques sans repenser fondamentalement la structure des inégalités et de la propriété: qui possède l'énergie et pour quoi faire

www.seuil.com/ouvrage/ener...

Rethinking world trade
When setting tariffs, Trump has followed a narrowly nationalist and rather chaotic logic. The opposite approach is needed: Tariffs should be set based on universal and predictable principles.
www.lemonde.fr/blog/piketty...

Lucas Chancel, économiste : « Seule la socialisation de l’énergie peut éviter aux Européens une vassalisation » Dans un entretien au « Monde », le professeur à Sciences Po estime que la reprise de contrôle du secteur énergétique par les citoyens permettrait de mieux lutter contre les crises climatiques et démoc...

www.lemonde.fr/idees/articl...

Nouvelle étude de @yajnagovind.bsky.social @paolosantini.bsky.social & E. Derenoncourt confirme l’importance du facteur discriminatoire sur le marché du travail en 🇫🇷. Les minorités racisées subissent de fortes pénalités salariales. Être né.e en France réduit ces écarts, sans les faire disparaître.

From trade wars to @un.org talks, global tax cooperation is at stake.
Oct 2, Paris, #ICRICT Commissioners, policymakers & civil society debate how to build a fairer international tax system amid great-power rivalry.
⏰6–8PM
📍Paris School of Economics
Inscriptions: shorturl.at/I6Kvp
#TaxThePower

Panel 1: Who Shapes the Rules? Trade Wars, Tax Battles and the Future of Global Governance (50 min) - 2 rounds of questions (40 min.) and (10 min.) of Q&A. International taxation is no longer a technocratic issue—it is caught in the crossfire of global power struggles. With the return of Trump, the U.S. is once again using tariffs and trade threats to dismantle Digital Services Taxes (DSTs) abroad, as well as the minimum tax on multinational corporations, defending its tech giants while undermining multilateral negotiations. This panel will examine how the weaponization of trade policy intersects with ongoing processes on international tax reform—from the OECD/G20 to the United Nations—raising fundamental questions about sovereignty, fairness, and the balance of power in global governance. Speakers will reflect on what is at stake: whether unilateralism and trade wars will derail efforts to build a fairer international tax system and what pathways exist toward an inclusive and equitable framework that can withstand great-power politics. Moderator: Victor Goury-Laffont (POLITICO). Joseph Stiglitz, ICRICT Co-Chair . Manon Aubry, Co-chair of the Left Group in the European Parliament Member of the ECON and FISC committees. Valérie Hayer, Présidente de Renew Europe au Parlement européen. Break and change of panel. Shaping the Future of International Tax Cooperation 3 7:05-7:50 PM 7:50-8:00 PM Panel 2: Negotiating the details: Key elements of the UN Framework Convention on International Tax Cooperation (45 min). Building on the political discussion, this panel will take a closer look at the concrete elements under negotiation in the UN Framework Convention on International Tax Cooperation and its early protocols on taxation of cross-border services and dispute prevention and resolution. Experts will examine proposals on the table, alternative measures advanced by different countries and regions, and the contrasting realities betwee…

Intl' taxation is caught in great power struggles, as Donald Trump attempts to dismantle digital services & global minimum taxes.
Join @josephestiglitz.bsky.social @thomaspiketty.bsky.social
@manonaubryfr.bsky.social & Valerie Hayer, on Oct 2!
📍@pse.bsky.social
⏰6 PM
Register: shorturl.at/I6Kvp

Thomas Piketty on global inequality | LSE Events 3.30pm Fri 19 Sept | Thomas Piketty | Ticket Required | Free public event at LSE

Don't miss tomorrow's event with @thomaspiketty.bsky.social on global #inequality including preliminary results from the #GlobalJusticeProject.

📍In-person and online public event

🎟️ Registration www.lse.ac.uk/events/globa...
@lsepress.bsky.social

📆 Save the date: the 3rd edition of the World Inequality Conference will take place on 4–5 June 2026 at Paris School of Economics @pse.bsky.social

The call for papers is open until December 1.

🔗 More details & submission: inequalitylab.world/en/event/wor...

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.

This study has many other findings but also limitations and we welcome constructive comments to continue building the #GlobalJustice Project inequalitylab.world/en/global-ju...

3️⃣ Over the long run, public-private splits varied widely. 19th-century Britain had huge negative public wealth (250–300% of GDP). The US also showed negative wealth in the late 20th/early 21st century, mostly foreign. By contrast, China today has substantial positive public wealth.

2️⃣ Private wealth is at record highs in all advanced regions.
Public wealth, by contrast, has declined to turn negative in North America, fall near zero in Europe, while East Asia has stabilized with 25-30% of national wealth in public hands.

1️⃣ Wealth has risen much faster than income since 1980.

Global wealth-income ratios have risen dramatically from about 390% of world net domestic product in 1980 to over 625% in 2025. This surge reflects both higher savings and strong capital gains, especially in housing and equity markets.

Our new study shows that the Kaldor’s stability claim does not hold at the global level.

Large historical and regional variations exist, that are shaped less by technology or pure economics than by institutions, ideology, and power relations.

Below are 3 key findings from the study👇

With L. Bauluz, P. Brassac, @jonasdietrich.bsky.social @cmtneztt.bsky.social @gatonievas.bsky.social @moritzoder.bsky.social , @alisodano.bsky.social @anmol-smnch.bsky.social, we constructed the first global database of wealth accumulation covering 1800–2025. It covers 85–90% of world GDP.

Net private wealth has skyrocketed since 1980 - this is one of the main findings of a new @wid.world study overturning the Kaldor’s facts.
More findings in thread 🧵
🔗Study wid.world/news-article...

"Un pays qui refuse de faire payer à ses plus riches citoyens le même impôt que les classes moyennes et populaires, qui renonce à toute possibilité... c'est un pays qui abandonne sa souveraineté" a dit notre commissaire @thomaspiketty.bsky.social dans BFMTV

D'où vient la colère sociale ? Discussion avec Thomas Piketty À la veille de la mobilisation « Bloquons tout » et au lendemain de la chute du gouvernement sur fond de débats autour de la dette et de la taxation des plus riches, Thomas Piketty fait paraître "Ce ...

Notre niveau de dette publique est aussi élevé qu'au moment de la révolution française. L'histoire montre que ce niveau d'endettement se règle toujours, au moins en partie, par des mesures exceptionnelles de redistribution du patrimoine privé, pas par l’austérité.

www.radiofrance.fr/francecultur...

Capital in the 21st Century, Ten Years Later - WID - World Inequality Database Capital in the 21st Century, Ten Years Later The source for global inequality data. Open access, high quality wealth and income inequality data developed by an international academic consortium.

On the 10th anniversary of *Capital in the 21st Century* and 5th of *Capital and Ideology*, @thomaspiketty.bsky.social shared key lessons from his work + insights on global inequality transformations, emphasizing reasons for optimism👇
wid.world/news-article...

Disponible en librairie >>> www.seuil.com/ouvrage/ce-q...

Une histoire du conflit politique Qui vote pour qui et pour quoi ? Comment se répartissent les votes et les richesses en France depuis deux siècles ? Rendez-vous sur unehistoireduconflitpolitique.fr !

*A History of Political Conflict. Elections and Social Inequalities in France 1789-2022*
>>> All data sets, visualization tools & book summaries are available on book website in english and french unehistoireduconflitpolitique.fr/home.html

Now available in english *A History of Political Conflict. Elections and Social Inequalities in France 1789-2022* 📚

Our book with Julia Cagé is out at @harvardpress.bsky.social >>> www.hup.harvard.edu/books/978067...

All data sets available below 👇

Débat de l'Egalité avec Lucas Chancel - World Inequality Lab A l’occasion de la sortie du nouvel ouvrage de Lucas Chancel, Energie et Inégalités, Une Histoire Politique, le Laboratoire sur les inégalités mondiales vous invite à une rencontre avec l’auteur […]

Pourquoi l’histoire de l’énergie est-elle liée à celle des inégalités ? Comment penser la transition énergétique à l’aune des conflits de répartition des richesses ?

📆 Rencontre & dédicace le 9 octobre avec @lucaschancel.bsky.social

✍️ Gratuit sur inscription inequalitylab.world/fr/event/deb...

A copy of A History of Political Conflict by Julia Cagé and Thomas Piketty ahead of a blurry mahogany background.

Who votes for whom, and why? These are questions that have been with us since the dawn of democracy.

In their new book, A History of Political Conflict, Julia Cagé and Thomas Piketty comb through more than 200 years of data to find answers.

Learn more: bit.ly/4lFvV5K
@thomaspiketty.bsky.social

Public ownership outperforms privatisation when an enterprise is a skill-based, natural, or network monopoly - WID - World Inequality Database Public ownership outperforms privatisation when an enterprise is a skill-based, natural, or network monopoly This paper develops a theory of when public or private ownership leads to better outcomes, ...

What should be publicly owned, or privatised?

@ewanmg.bsky.social builds develops a theory of when public or private ownership leads to better outcomes, using comparative data from OECD countries in sectors such as water, rail, electricity, and telecommunications ▶️ wid.world/news-article...

The recent compression of US wage inequality: tightness, turbulence, and power-biased policy - WID - World Inequality Database The recent compression of US wage inequality: tightness, turbulence, and power-biased policy This paper evaluates the extent to which the recent wage compression in the US can be explained by the gene...

Since COVID, US wage inequality has sharply narrowed -undoing ~⅓ of the rise since 1980 🇺🇸

@adamaboobaker.bsky.social & P. Skott show why tight labor markets alone can’t explain it: policy design, turbulence & shifting power matter.

Read more▶️ wid.world/news-article...

We've updated wpid.world to cover recent trends in political polarization around the world! 🌍
Among striking results, the 2024 U.S. election saw educational divides that are unprecedented in modern history 👇
explore.wpid.world/intime/educ/vo

Inequalities in exposure to environmental risks are high and vary across home ownership status - WID - World Inequality Database This paper examines explores how natural disaster risks—specifically flooding and subsidence—are distributed across different types of property owners in France.

Inequalities in exposure to environmental risks – flooding and subsidence – are high and vary across home ownership status in France (owner-occupants, and owners of rental, second, or vacant homes) [🧵1/6]
New study by Thomas Bézy 🔗 wid.world/news-article...

How should we analyze the new wave of trade tensions that gripped the world in 2025? To better understand the issues at stake, the World Inequality Lab @wid.world recently published a historical study on global trade and financial imbalances since 1800 www.lemonde.fr/blog/piketty...

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.

This paper is the third in a series of research papers and technical notes that will form the backbone of the #GlobalJusticeProject, due to be released in June 2026.

Find out more inequalitylab.world/en/global-ju...

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