Peru 🇵🇪 has developed one of the most regressive tax systems in the world, characterized by low top marginal rates on income and inheritance and a limited capacity for redistribution. This is one of the key findings of @ccastgr.bsky.social's paper ▶️ wid.world/news-article... Spanish coverage ⬇️🧵

The Global Democratic Deficit: Undemocratic international institutions favor powerful countries—they secure power in the international system at a very cheap cost and chose who benefits from aid 🧵A thread on a NEW STUDY written with @PaulaDruschke 1/6 wid.world/news-article...

New on @wid.world: @gatonievas.bsky.social & P. Druschke find that 70% of World Bank and IMF funds are allocated to G7 geopolitically aligned countries. Rich countries pretend to be in favour of democracy but in practice they've built an undemocratic international system. wid.world/news-article...

𝐖𝐡𝐨 𝐫𝐞𝐚𝐥𝐥𝐲 𝐛𝐞𝐧𝐞𝐟𝐢𝐭𝐬 𝐟𝐫𝐨𝐦 𝐭𝐚𝐱 𝐛𝐫𝐞𝐚𝐤𝐬 𝐨𝐧 𝐩𝐨𝐥𝐢𝐭𝐢𝐜𝐚𝐥 𝐝𝐨𝐧𝐚𝐭𝐢𝐨𝐧𝐬? New research by Julia Cagé, @mgn89.bsky.social and Yuchen Huang suggests these can act as a windfall for a small group of donors, with no effect on participation or amounts given wid.world/news-article...

New working paper on @wid.world Bottom line: Had mining prices followed fuel prices over 1970–2025, Sub-Saharan Africa would own the world. Bargaining power and institutions matter.

"The militaristic drift of the United States resonates above all as a terrible admission of weakness in the face of the financial, commercial and political fragility of the country." My opinion piece in @lemonde.fr thomaspiketty.wordpress.com/2026/03/10/m...

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...

📝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...

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...

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-...

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...

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...

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 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

There is a strong positive association between equality and development over the long run — that's what this new study based on our historical series available on wid.world is clearly showing. Key findings in thread 🧵(1/9)👇

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...

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...

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

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

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...

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

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...

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...

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 👇

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...

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

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...

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 – 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...

Children in Sub-Saharan Africa receive just 3% of the public education funding available to their peers in Europe and North America. 🧵A thread on a NEW STUDY written with @nitin-k-bharti.bsky.social A. Gethin @markjmn.bsky.social @zhexunmo.bsky.social & L. Yang. 🔗 wid.world/www-site/upl... [1/10]

📄In this new theory working paper, S.Subramanian makes the case for combining across the board measures with tailender indices into a composite index to measure and mitigate inequality. Read more: wid.world/news-article...