The world (minus the #US) is negotiating a global #UNTaxConvention! Join José Antonio Ocampo @toveryding.bsky.social @ryadslmn.bsky.social @qparrinello.bsky.social Eva Joly & Wanda Montero, Thursday Oct 2, in Paris. 📍@pse.bsky.social ⏰6-8pm To register: shorturl.at/I6Kvp

1/6 Does requiring stronger due diligence for foreign sourcing work? 🤔 Our latest policy note by @nmoreaukastler.bsky.social and @giuliavaraschin.bsky.social looks at the US experience with conflict minerals 🧵 Read the full note: www.taxobservatory.eu/publication/...

Un travail extrêmement impressionnant d'une équipe de l'IPP sur la taxation des très hauts revenus. Il y a plein de choses à en tirer, mais cela (re)confirme que les ménages extrêmement fortunés contournent l'imposition individuelle sur le revenu en se servant des sociétés qu'ils contrôlent.

Laurent Bach@laurent-bach.bsky.social · 11mo ago

Nous mettons en accès public un document de travail (« working paper ») qui reprend et étend la note 92 de l’IPP sur l’imposition des milliardaires (1/10) www.ipp.eu/publication/...

Today, our Policy Director, @qparrinello.bsky.social, was auditioned by the FISC Committee of the European Parliament on the implications of Trump administration tax policies on Europe 🇪🇺 📺 Watch the full session: multimedia.europarl.europa.eu/en/webstream...

This one is for the kids www.instagram.com/reel/DOqNUC-...

Matt Collin@mattcollin.bsky.social · 11mo ago

🚨New working paper🚨 In this updated work with Annette Alstadsaeter, @bluebery-planterose.com , @gabrielzucman.bsky.social and @andokl.bsky.social , we use leaked data to chart the rise of offshore real estate in Dubai www.taxobservatory.eu//www-site/up...

"A solution to France’s fiscal and political stalemate has been hiding in plain sight: a tax on the ultrawealthy" in the New York Times www.nytimes.com/2025/09/09/o...

Opinion | The Solution to France’s Woes Is Hiding in Plain Sight

nytimes.com

Impôts et prestations: quels effets attendre d’une « année blanche »? Par @pmadec.bsky.social % au revenu, l'effet d'un gel est bien évidemment plus fort sur les ménages modestes (via les prestations) que sur un ménage médian (via l'IR) www.ofce.sciences-po.fr/blog2024/fr/...

Think how much you pay in taxes. Now think about this: The ultra-wealthy pay between 0% and 0.6% of their wealth in individual income tax – around 0.6% in a country like the United States and 0.1% in a country like France. We wrote about it in @lemonde.fr www.lemonde.fr/en/opinion/a...

Tax on ultra-rich: 'France has the opportunity to lead the way,' say Nobel Prize-winning economists

OP-ED. As public deficits balloon and extreme wealth explode, creating a minimum tax on the assets of billionaires should be a priority, argue seven Nobel Prize-winning economists in an op-ed for Le M...

lemonde.fr

An international call for action just got louder: Today, 7 Nobel Laureates have issued a powerful call for a minimum tax on the ultra-wealthy in Le Monde Here’s a quick breakdown of the debate—and where things stand globally 🧵 www.lemonde.fr/en/opinion/a...

Tax on ultra-rich: 'France has the opportunity to lead the way,' say Nobel Prize-winning economists

OP-ED. As public deficits balloon and extreme wealth explode, creating a minimum tax on the assets of billionaires should be a priority, argue seven Nobel Prize-winning economists in an op-ed for Le M...

lemonde.fr

7️⃣Prix Nobels d'économie défendent un impôt minimum sur les plus riches modelé sur la taxe #Zucman. www.lemonde.fr/idees/articl...

« Avec l’impôt sur les ultrariches, la France peut montrer la voie au reste du monde » : le plaidoyer de sept Prix Nobel d’économie pour la taxe Zucman

TRIBUNE. A l’heure de la dérive des comptes publics et de l’explosion de l’extrême richesse, créer un impôt plancher sur les patrimoines des milliardaires devrait être une priorité, estiment des lauré...

lemonde.fr

And two became three. #SouthAfrica joins Spain and Brazil in backing the Sevilla Platform to tax the ultra-rich and build fairer global tax systems. Because tax justice isn’t local — it’s global. #FfD4 #TaxTheSuperRich #UNTaxConvention

“Fairer taxation of large fortunes”. Spain will work with Brazil and other countries to ensure taxation of the super-rich. Watch Spain’s PM, Pedro Sánchez Pérez-Castejón's announcement during the launch of the Sevilla Platform for Action at #FfD4. ⤵ #TaxThePower #TaxTheSuperRich

"The research is clear: at the very top of the distribution, the super-rich pay less tax relative to their economic income than the rest of the population—fuelling inequality. Taxing HNWIs brings direct revenue & indirectly boosts funding by rebuilding tax consent." @qparrinello.bsky.social at #FfD4

Olivier Blanchard, Jean Pisani-Ferry et Gabriel Zucman : « Nous partageons le constat qu’un impôt plancher sur les grandes fortunes est le plus efficace face à l’inégalité fiscale »

Olivier Blanchard, Jean Pisani-Ferry et Gabriel Zucman : « Nous partageons le constat qu’un impôt plancher sur les grandes fortunes est le plus efficace face à l’inégalité fiscale »

TRIBUNE. Le dispositif cible les centimillionnaires qui mettent en place des schémas d’optimisation pour échapper à l’impôt. Il ne fait que mettre en conformité nos lois fiscales avec le principe d’ég...

lemonde.fr

📢 We’re looking for an Administrative Manager to keep our team running smoothly. If you’re organized, proactive, and thrive behind the scenes – this one’s for you. 👉 Learn more & apply: www.taxobservatory.eu/administrati...

💥 “It sounds like we should tax billionaires…” A 2% minimum tax on the ultra-rich is the punchline with a plan: make them pay what ordinary people already do. With growing global momentum, this is no longer just theory. Read: www.ft.com/content/859e...

Meet the insurgent economists promoting a global wealth tax

Gabriel Zucman is leading a movement for billionaires to pay at least 2 per cent of their net worth each year

ft.com

💡 Mesurer l’évitement fiscal & environnemental: Notre collègue @mathieupar.bsky.social, finaliste du Prix du meilleur jeune économiste 2025, revient sur le pouvoir de marché des multinationales, l’optimisation fiscale et la taxe carbone aux frontières. @lemonde.fr 👇 www.lemonde.fr/economie/art...

Mathieu Parenti : « Mesurer l’évitement fiscal et environnemental »

A 39 ans, ce professeur à l’Ecole d’économie de Paris et chercheur à l’Inrae s’intéresse au commerce international et au rôle des grandes entreprises dans la mondialisation.

lemonde.fr

"We want rich individuals to pay as much as the rest of the population. This is not a radical idea. The proposal made by Brazil at the G20 is not a wealth tax — it’s a top-up tax targeting a much smaller, wealthier group who currently avoid other taxes." 💬 @qparrinello.bsky.social

En Europe, les multinationales paient moins d'impôts qu'il y a 10 ans. Pourquoi? Découvrez notre dernière note avec @julesducept.bsky.social & Sarah Godard pour @taxobservatory.bsky.social qui met en lumière les nouveaux visages de la compétition fiscale des multinationales.

International Tax Observatory@taxobservatory.bsky.social · last yr.

1/ 📉 Multinational companies in the EU are paying less tax now than they did a decade ago. But why? Our new policy note reveals that the average effective tax rate of MNEs in the EU dropped 2.7 percentage points from 2014 to 2022. 🔎 For more insights: www.taxobservatory.eu/publication/...

1/ 📉 Multinational companies in the EU are paying less tax now than they did a decade ago. But why? Our new policy note reveals that the average effective tax rate of MNEs in the EU dropped 2.7 percentage points from 2014 to 2022. 🔎 For more insights: www.taxobservatory.eu/publication/...

"Scientific evidence is clear: tax progressivity drops at the top, eroding trust and domestic revenue mobilization. As we head to #FfD, it’s vital that fair taxation of HNWIs remains front and center — and that we build coalitions of the willing to advance the agenda." 💬 @qparrinello.bsky.social

Delighted to be at the EU Council today to talk about own resources for the EU We need a minimum tax on ultra-high net worth individuals We know we can do it And it would generate a lot of (much needed) revenue! www.taxobservatory.eu//www-site/up...

$1 Trillion of Wealth Was Created for the 19 Richest U.S. Households Last Year www.wsj.com/economy/1-tr...

Just finished teaching a class on taxation in the Economics and Public Policy master's at @sciencespo.bsky.social. My slides, heavily inspired by courses by Charles Brendon, @gabrielzucman.bsky.social, and Emmanuel Saez, are here: 👉 wouterleenders.eu/KAFP3355/06_... Feedback very welcome!

C’est la petite musique qui monte : en ces temps de disette budgétaire il n’y aurait pas grand-chose à récupérer en s’attaquant à la fraude fiscale ; l’argent se trouverait plutôt du côté de la fraude sociale. Malheureusement cela ne repose sur rien. Petit état des savoirs sur le sujet 🧵

Do you like the work of @taxobservatory.bsky.social & @gabrielzucman.bsky.social ? We are looking for a Senior Policy Advisor to join our Policy Team. Help us promote the research work of the Observatory to policymakers to improve the fight against tax evasion and unfair tax competition.

International Tax Observatory@taxobservatory.bsky.social · last yr.

📢 Ever wanted to work on taxation & public policy? Now’s your chance! We’re hiring a Senior Policy Advisor to join our amazing policy team — turning cutting-edge research into real-world impact through policy recommendations. Apply by May 4: www.taxobservatory.eu/senior-polic...

Once again, I must stress that there is a pretty obvious answer to this madness, which is to have a big, fat tariff on US oligarchs and their multinationals! gabrielzucman.substack.com/p/americas-o...

America’s Oligarchs Are Trump’s Achilles’ Heel

The best thing that countries targeted by Trump's punitive tariffs can do is condition market access for foreign multinationals and billionaires on fair taxation.

gabrielzucman.substack.com

1/ NEW RESEARCH: Our study reveals 46% of pesticides embedded in EU agricultural consumption originate from imports, despite imports constituting only 17% of consumption. This includes substances prohibited in the EU. This regulatory gap fuels leakage effects and hurts EU competitiveness 🧵

Last week, we released our note on the #MinimumTax on the super-rich, sparking discussions at the EU Tax Symposium. Momentum is building, and we’ll keep the conversation going at our conference in April. Here are some key highlights from the Symposium: youtu.be/HBe-jecBMc0

Discussion on the minimum tax on the super-rich at last week's EU Tax Symposium

YouTube video by EU Tax Observatory

youtu.be

“The biggest challenge that we have for taxing the super-rich is believing that we can’t” 👏👏👏 Esther Lynch at tghe EU Tax Symposium 2025. #TaxMix2050 #TaxTheSuperRich