Thomas Piketty
@thomaspiketty.bsky.social
Professor at EHESS & PSE
Co-Director, World Inequality Lab
inequalitylab.world | WID.world
http://piketty.pse.ens.fr/
Thomas Piketty is a French economist who is a professor of economics at the School for Advanced Studies in the Social Sciences, associate chair at the Paris School of Economics (PSE) and Centennial Professor of Economics in the International Inequalities Institute at the London School of Economics (LSE). .. more
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Thomas Piketty
@thomaspiketty.bsky.social
· Jun 19
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.
inequalitylab.world
What would a just distribution of socio-economic and environmental resources look like at the global level from 2025 to 2100 – both between and within countries?
From now to June 2026, the #GlobalJusticeProject will help provide answers.
inequalitylab.world/en/global-ju...
[1/5]🧵
From now to June 2026, the #GlobalJusticeProject will help provide answers.
inequalitylab.world/en/global-ju...
[1/5]🧵
🚨NEW REPORT: The Climate Inequality Report 2025 reveals how wealth inequality and the climate crisis drive each other.
What's new in the report? — A thread🧵
Download the report▶️ wid.world/news-article...
#cop30 #climatejustice #inequality
What's new in the report? — A thread🧵
Download the report▶️ wid.world/news-article...
#cop30 #climatejustice #inequality
Climate inequality report 2025 | Climate Change: A Capital Challenge - Why Climate Policy Must Tackle Ownership - WID - World Inequality Database
This new report reveals how wealth drive the climate crisis, and proposes new policy options to address it.
wid.world
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
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
Climate inequality report 2025 | Climate Change: A Capital Challenge - Why Climate Policy Must Tackle Ownership - WID - World Inequality Database
This new report reveals how wealth drive the climate crisis, and proposes new policy options to address it.
wid.world
🚨NEW REPORT: The Climate Inequality Report 2025 reveals how wealth inequality and the climate crisis drive each other.
What's new in the report? — A thread🧵
Download the report▶️ wid.world/news-article...
#cop30 #climatejustice #inequality
What's new in the report? — A thread🧵
Download the report▶️ wid.world/news-article...
#cop30 #climatejustice #inequality
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)
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.
inequalitylab.world
(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...
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.
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.
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.
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.
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.
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.
WID.world
(2/9)
Our new study uses wid.world data (1800–2025)and new global series on productivity and human capital to revisit how the relationship between equality and development has evolved across time and space – a central question for economists, policymakers, and citizens alike.
Our new study uses wid.world data (1800–2025)and new global series on productivity and human capital to revisit how the relationship between equality and development has evolved across time and space – a central question for economists, policymakers, and citizens alike.
Reposted by Branko Milanovic, Simon Hix
Does #equality promote #inclusion and #productivity, or hinder #growth❓
🔴Our new study revisits this long-running debate — finding a strong positive link between equality and development over the long run.
Read more▶️ wid.world/news-article...
🔴Our new study revisits this long-running debate — finding a strong positive link between equality and development over the long run.
Read more▶️ wid.world/news-article...
Equality and Development: A Comparative & Historical Perspective 1800-2025 - WID - World Inequality Database
Equality and Development: A Comparative & Historical Perspective 1800-2025 This paper combines income and wealth inequality series from the World Inequality Database (WID) and new global series on hou...
wid.world
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)👇
Key findings in thread 🧵(1/9)👇
Reposted by Thomas Piketty
Equality and Development: A Comparative & Historical Perspective 1800-2025 - WID - World Inequality Database
Equality and Development: A Comparative & Historical Perspective 1800-2025 This paper combines income and wealth inequality series from the World Inequality Database (WID) and new global series on hou...
wid.world
Does #equality promote #inclusion and #productivity, or hinder #growth❓
🔴Our new study revisits this long-running debate — finding a strong positive link between equality and development over the long run.
Read more▶️ wid.world/news-article...
🔴Our new study revisits this long-running debate — finding a strong positive link between equality and development over the long run.
Read more▶️ wid.world/news-article...
Reposted by Thomas Piketty
World Inequality Lab
@wid.world
· Oct 7
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.
wid.world
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...
👉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...
www.seuil.com
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...
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
Confronted with the impact of Donald Trump's policies, Europe – like other parts of the world – has no choice but to fundamentally rethink its trade rules. To put it plainly: If Europe does not urgent...
www.lemonde.fr
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...
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...
Reposted by Thomas Piketty
