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Posts by Samuel Bentolila

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Presenting a model of university organization and sketching the evolution of the university’s products and conflicts over the last 900 years, from @davidmcutler.bsky.social and Edward L. Glaeser www.nber.org/papers/w35079

2 days ago 12 4 0 3
Standard theories of electoral competition predict that politicians should converge toward the centre as elections approach. This column challenges this prediction, using 3.4 million tweets from 367 political leaders across 21 Western democracies. Rhetorical polarisation between populist and non-populist leaders rises sharply in the two quarters before an election and reverts to average levels once it is over. Both groups adopt a more emotionally direct communication style as elections near, but they increasingly talk about different topics. The findings suggest that social media turns electoral campaigns into an engine of political polarisation.

Standard theories of electoral competition predict that politicians should converge toward the centre as elections approach. This column challenges this prediction, using 3.4 million tweets from 367 political leaders across 21 Western democracies. Rhetorical polarisation between populist and non-populist leaders rises sharply in the two quarters before an election and reverts to average levels once it is over. Both groups adopt a more emotionally direct communication style as elections near, but they increasingly talk about different topics. The findings suggest that social media turns electoral campaigns into an engine of political polarisation.

T Boeri, N Nikiforova, & G Tabellini find rhetorical polarisation between populist and non-populist leaders rises sharply in the 2 quarters prior to an election, challenging standard theories that politicians should converge toward the centre as elections approach.
cepr.org/voxeu/column...
#EconSky

2 days ago 5 4 0 0
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Inmigración: el debate que España se debe a sí misma Si queremos apostar por un modelo de mayor productividad y mayores salarios, la política migratoria debe estar alineada con ese objetivo

elpais.com/opinion/2026...

5 days ago 2 1 0 0
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How aggregate and individual shocks combine to shape household incomes - Econ Brief How important are the ups and downs of the economy for individual families? Personal setbacks have more permanent effects on households’ lifetime earnings than a general economic downturn. But macroec...

Personal setbacks have more permanent effects on households’ lifetime earnings than a general economic downturn; but macroeconomic shocks are still critical because they set the stage on which microeconomic shocks play out - research by Richard Blundell et al

ucleconbrief.co.uk/2026/04/16/h...

1 week ago 3 2 0 0
Stacked bar chart of government spending by category (social protection, health, education, economic affairs, public services, other, defense) as a share of GDP for a selection of OECD countries, where it compares spending composition and shows totals of 28% to 57% of GDP with an OECD average of 43%. Data source: OECD (2026). License: CC BY to Our World in Data.

Stacked bar chart of government spending by category (social protection, health, education, economic affairs, public services, other, defense) as a share of GDP for a selection of OECD countries, where it compares spending composition and shows totals of 28% to 57% of GDP with an OECD average of 43%. Data source: OECD (2026). License: CC BY to Our World in Data.

📊 How much do governments spend, and what do they spend it on?

In the chart, we see total government spending broken down by purpose, such as health, education, and defense, relative to the size of the economy (as measured by GDP).

This is shown for a selection of OECD countries.

1 week ago 43 17 4 1
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Forecasts of how AI will affect the US economy, from Karger, Kuusela, Abaluck, Bryan, Halperin, Jones, Murphy, Trammell, Reynolds, Mayland, Viswanathan, Mittal, Ceppas de Castro, Rosenberg, and Tetlock www.nber.org/papers/w35046

1 week ago 6 3 0 0
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I coded up an open-source, not-for-profit AI paper reviewer that rivals the performance of
@reviewer3com.bsky.social, Refine.ink, and Stanford Agentic Reviewer (according to Gemini 3.1). Costs <$2!

Live @ coarse.ink. Plug in paper, @openrouter.bsky.social key, and email. #econsky

1 week ago 40 10 3 1
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Ideological Alignment and Evidence-Based Policy Adoption (Forthcoming Article) - The implementation of evidence-based policies hinges on the dissemination of evidence to policymakers, a process influenced by the attributes of the sender. We conducted a nationwide RCT with ideologically opposite think tanks, major newspapers, and a research institution with nonsalient ideology to communicate a non-ideological, cost-effective policy to local policymakers. Results show a 65% increase in policy adoption when informing institutions align ideologically with policymakers. We also compare the impact of think tanks versus media outlets on implementation, finding both equally effective when ideologically aligned. We propose and test a three-stage policy adoption framework: information exposure, belief updating, and implementation.

Forthcoming in the AER: "Ideological Alignment and Evidence-Based Policy Adoption" by Jorge García-Hombrados, Marcel Jansen, Angel Martínez, Berkay Özcan, Pedro Rey-Biel, and Antonio Roldán-Monés.

1 week ago 5 1 0 0
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New Working Paper! 📢
Read it here: cemfi.es/ftp/wp/2605....

2 weeks ago 1 2 0 0
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Congratulations to Barbara Petrongolo for being appointed as AER coeditor, handling papers in labor and related fields. Her term will start on September 1. I’m delighted to have her on our team. @aeajournals.bsky.social #EconSky

2 weeks ago 21 6 0 0
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Roundup #80: All AI, all the time Growth; Biosecurity; Cybersecurity; Pseudonymity; Quant trading; AI adoption

Roundup #80: All AI, all the time

2 weeks ago 7 4 0 0
The machines are fine. I'm worried about us. On AI agents, grunt work, and the part of science that isn't replaceable.

Two thoughtful essays about the impact of LLMs on graduate education:

ergosphere.blog/posts/the-ma...

economics.mit.edu/sites/defaul...

From personal experience I think the self-control problem mentioned in the first essay is very real.

2 weeks ago 34 11 2 1

New in the American Economic Review: migration doesn't hollow out the home economy — it builds it up.

More than 75% of the long-run income gains from migration are domestic. The home economy itself grows.

Here's what we found: 🧵

3 weeks ago 115 43 1 4
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🧵1/ Our first meta-science paper (with 350+ coauthors) is published today in Nature. It presents one of the largest-ever reproducibility projects in economics & political science.

Here’s what we found 👇

3 weeks ago 166 89 2 21

Did a series of videos with Markus Brunnermeier on Claude Code (more to come)

Video 1: Getting Started with CC

open.substack.com/pub/paulgp/p...

3 weeks ago 193 42 9 8
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Maybe you should have bought an electric car

Maybe you should have bought an electric car

3 weeks ago 7 4 1 0
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Banco de España cerró 2025 con un beneficio de 234 M, transferidos al Tesoro Público. Vuelve a resultados positivos tras las pérdidas de 2023 y 2024, en línea con el Eurosistema. www.bde.es/wbe/es/notic... #bdePublicaciones

3 weeks ago 1 1 0 0

Fin de epoca. Comienzo de otra.

3 weeks ago 5 4 1 0
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Opinion | There’s a Good Reason Why You Can’t Concentrate

There’s a Good Reason Why You Can’t Concentrate www.nytimes.com/2026/03/27/o...

3 weeks ago 0 1 0 0

Querido Anxo, somos nosotros los agradecidos. Tus entradas en NeG, en especial sobre el cambio climático, fueron excelentes. Y nunca olvidaré que fuiste el único no economista de la junta de la Asociación NeG, que aceptó ejercer de… ¡tesorero! Un fuerte abrazo

3 weeks ago 1 0 0 0

Ya lo dije en su momento, pero lo vuelvo decir. Debo tanto a @nadaesgratis.bsky.social ... En particular a los dos caballeros que firman esta despedida. Antonio me lío para hacer de científico residente en este blog, y @samben8.bsky.social me aguantó cuando era editor en mis primeros posts. Gracias

3 weeks ago 7 3 1 0
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In spite of all the talk of Claude Code and Codex meaning the end of humans writing code, software job adverts are actually going up, according to @jburnmurdoch.ft.com's crunching of millions of job ads for this week's The AI Shift www.ft.com/content/7325...

4 weeks ago 559 174 20 51

"Después de usar la IA en una tarea cotidiana y observar su eficiencia, es inevitable preguntarse por lo que viene: ¿cuánto más productivos seremos?"

1 month ago 0 3 0 0
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Applications for the CEMFI Summer School 2026 are welcome.

Sharpen your skills this summer with advanced training in Economics and Finance, taught by world-class academics and industry experts.

Apply now: www.cemfi.es/programs/css...

4 weeks ago 2 5 0 0
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Wealth is highly concentrated and largely inherited in countries such as Spain, Italy, Austrian and Germany. Inheritances and gifts play a considerably smaller role in net wealth in countries such as Portugal, Hungary or Latvia.

4 weeks ago 13 9 2 2
GDP per capita, 1820 to 2022 — line chart showing GDP per person for Spain and Argentina from 1820 to 2022, with the vertical axis in dollars from $0 to $35,000 and the horizontal axis in years. For much of the 19th and early 20th centuries Argentina has higher GDP per capita than Spain; the two lines meet around the mid 20th century and after about 1960 Spain’s GDP per capita rises sharply and moves well above Argentina’s. By 2022 Spain is near $35,000 per person while Argentina peaks near $20,000 in earlier decades and is around $17,000 by 2022. Data source: Bolt and van Zanden – Maddison Project Database 2023. A note explains that the data is expressed in international-$ at 2011 prices. The license is CC BY.

GDP per capita, 1820 to 2022 — line chart showing GDP per person for Spain and Argentina from 1820 to 2022, with the vertical axis in dollars from $0 to $35,000 and the horizontal axis in years. For much of the 19th and early 20th centuries Argentina has higher GDP per capita than Spain; the two lines meet around the mid 20th century and after about 1960 Spain’s GDP per capita rises sharply and moves well above Argentina’s. By 2022 Spain is near $35,000 per person while Argentina peaks near $20,000 in earlier decades and is around $17,000 by 2022. Data source: Bolt and van Zanden – Maddison Project Database 2023. A note explains that the data is expressed in international-$ at 2011 prices. The license is CC BY.

Until fifty years ago, Argentina was richer than Spain—

(This Data Insight was written by @eortizospina.bsky.social.)

In a recent Data Insight, I wrote about how Argentina was one of the richest countries in the world at the beginning of the 20th century.

1 month ago 68 22 3 4
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¿Cómo podemos hacer que la investigación en economía tenga impacto en las políticas públicas? En esta entrada quería reflexionar sobre lo que podemos hacer quienes investigamos en economía para facilitar que nuestro trabajo tenga más impacto en las políticas públicas. Son reflexiones motivadas...

¿Cómo podemos hacer que la investigación en economía tenga impacto en las políticas públicas? nadaesgratis.es/marcos-vera/... Vía @nadaesgratis.bsky.social #Economía

1 month ago 10 11 0 2
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Cool Cities: The Value of Urban Trees (Forthcoming Article) - As urban populations grow, more people face extreme heat, increasing demand for natural cooling. Urban trees offer various amenities, including cooling benefits, yet their economic value is hard to quantify. This paper estimates the implicit value of urban trees by exploiting the Emerald Ash Borer infestation caused by an invasive beetle that kills ash trees in Toronto as an exogenous shock. We find that a onepercentage- point increase in a postcode’s tree cover raises property prices by 1.13% and reduces exposure to extreme heat, pollution, and energy consumption. These findings underscore trees as a cost-effective, practical strategy for mitigating urban warming.

Forthcoming in AER: Insights: "Cool Cities: The Value of Urban Trees" by Lu Han, Stephan Heblich, Christopher Timmins, and Yanos Zylberberg.

1 month ago 18 9 0 0
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New Acemoglu et al. paper: AI may boost short-term decision quality but can erode the learning incentives that sustain collective knowledge in society, creating a risk of long-run knowledge decline or collapse.

1 month ago 29 11 1 4
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Azar y género en la universidad: qué se pierde cuando las mujeres no consiguen la plaza Por Manuel Bagues, Milan Makany, Giulia Vattuone y Natalia Zinovyeva Las mujeres siguen estando infrarrepresentadas en los escalones más altos de la universidad. En Estados Unidos y en la Unión Europ...

Azar y género en la universidad: qué se pierde cuando las mujeres no consiguen la plaza nadaesgratis.es/admin/el-aza... Vía @nadaesgratis.bsky.social #Economía

1 month ago 5 5 0 1