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Posts by Léo Picard

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🚨🚨 New article: How much do the Swiss dislike fellow citizens with different political views? Benjamin Jansen & Alois Stutzer study affective polarization using split-ticket voting in parliamentary elections.
link.springer.com/article/10.1...
@mariusbrulhart.bsky.social @kaufmanndani.bsky.social

2 months ago 4 4 1 0
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"Elections, Right-Wing Populism, and Political-Economic Polarization: The Role of Institutions and Political Outsiders" by Valentina Gonzalez-Rostani.

www.journals.uchicago.edu/doi/10.1086/...

2 months ago 4 2 0 0
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Political communication research overwhelmingly relies on text. But parliamentary speech is multimodal! In our new @psrm.bsky.social article, Mathias Rask and I show that legislators also signal partisan conflict nonverbally— through changes in vocal pitch during floor speeches. 🧵 1/11 #polisky

4 months ago 85 24 3 1
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Stupeflip - Hypnoflip Invasion 🇨🇵

5 months ago 1 0 1 0
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And new paper out: Pleias 1.0: the First Family of Language Models Trained on Fully Open Data

How we train an open everything model on a new pretraining environment with releasable data (Common Corpus) with an open source framework (Nanotron from HuggingFace).

www.sciencedirect.com/science/arti...

6 months ago 180 51 9 8
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How much did Elon's takeover reshape Twitter/X? How did the partisan tilt of social media use change from 2020 to 2024?

The ANES 2024 data is out — and this thread answers all your burning questions! 🔥

7 months ago 49 30 2 3
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Ideas Have Consequences The Impact of Law and Economics on American Justice* Abstract. This paper empirically studies the effects of the early law-and-economics movement on the U.S. judiciary. We focus on the Manne Economics Institu

Recently accepted by #QJE, “Ideas Have Consequences: The Impact of Law and Economics on American Justice,” by Ash (@elliottash.bsky.social), Chen, and Naidu: doi.org/10.1093/qje/...

7 months ago 8 3 0 1
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Ripping the public apart? Politicians’ dark personality and affective polarization ALESSANDRO NAI, FREDERICO FERREIRA DA SILVA, LOES AALDERING, KATJANA GATTERMANN, DIEGO GARZIA

🌅📙 64.3

Do narcissistic leaders fuel political division? 🧠📊

These authors (🧵⬇️) find that when voters feel close to a leader with dark traits they become more polarized, disliking opposing parties even more. #AffectivePolarization #PoliticalPsychology

🔗https://buff.ly/ptbrrU6

7 months ago 10 7 2 0

Thrilled to see our paper published in the American Economic Review!! 👇👇👇
We show that candidates in US and French elections move to the center during the campaign, reflecting strategic adjustment to their opponents.
@aeajournals.bsky.social with R. Di Tella, R. Kotti and @clpennec.bsky.social (1/n)

8 months ago 15 4 1 0

An unpopular view: new diff-in-diff methods have been a setback for empirical work. I see an increased flow of papers that do 5 variants of them plus extensive torturing of parallel trends robustness to "prove" that a weak research design is solid. That effort could've been spent more productively

10 months ago 119 21 9 6
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🚨NEW PAPER: Why are Members of Congress so extreme?

We conducted a 4-wave panel of thousands of voters in 27 districts during last year’s primary AND general elections to trace polarization’s roots

The results challenge conventional wisdom… and suggest lessons for parties🧵👇

10 months ago 83 24 5 10

@elliottash.bsky.social

10 months ago 1 0 0 0
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Web Search Personalization during the US 2020 Election (Forthcoming Article) - We study the impact of web search personalization on ideological segregation in search results. We deploy 150 synthetic internet users with randomized partisan browsing prefere...

Forthcoming in AER: Insights: "Web Search Personalization during the US 2020 Election" by Ulrich Matter and Roland Hodler. www.aeaweb.org/articles?id=...

11 months ago 9 1 0 0
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Breaking: Pleias releases a new generation of small reasoning models for RAG and source synthesis. Pleias-RAG-350M and Pleias-RAG-1B come with built-in support for source citation, SOTA performance and an accuracy comparable to models ten times their size. huggingface.co/PleIAs/Pleia...

11 months ago 76 16 2 2
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The Effects of Partisan Elites’ Violent Rhetoric on Support for Political Violence - Political Behavior Violent partisan hostility is a growing concern for American democracy, yet the role of partisan elites in driving support for political violence remains underexplored. This is especially problematic ...

Elites’ violent rhetoric increases support for political violence among co-partisans in the public
link.springer.com/article/10.1...

1 year ago 27 17 0 0

I wrote my master's thesis under the name: "The Smell of Trouble: Natural Gas Dependence and Interstate Conflicts" 🤡

1 year ago 1 0 1 0

Prompted by news of prosecutors seeking death penalty for Luigi #Mangione, we share findings from a natural experiment based on his case.

We find that Mangione's arrest led to a small rise in support for #PoliticalViolence among Dems.

📝 Preprint: osf.io/preprints/os...
📊 Data & code: osf.io/y5mn3/

1 year ago 19 6 1 1
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🚨New Working Paper:

The Value of Worker Rights in Collective Bargaining

w/ @elliottash.bsky.social , W. Bentley MacLeod & Suresh Naidu

We propose novel NLP methods applied to 30,000 collective bargaining agreements to quantify the value of worker rights.

👉 nber.org/papers/w33605

🧵1/7

1 year ago 21 11 1 0
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Many feel that politics globally has become toxic and hostile over recent years.

But is this actually the case? And if so, who's to blame? What issues are driving toxicity?

We analyze 18M tweets from politicians in 17 countries to find out!

w/
@julianachueri.bsky.social

arxiv.org/pdf/2503.22411

1 year ago 67 31 4 3
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French Fox News? Audience-level metrics for the comparative study of news audience hyperpartisanship French news channel CNEWS is regularly compared to Fox News due to presumed ties with the far right, and for promoting conspiracy theories and partisan propaganda. Using data from the ReCitCom proj...

J’invite les intéressés à lire la toute première étude scientifique attestant de la dérive idéologique de CNEWS, publiée dans le prestigieux Journal of Information Technology and Politics, et dans laquelle je démontre que les téléspectateurs de CNEWS sont plus radicaux encore que ceux de Fox News.

2 years ago 1 1 0 0
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Just published in @jpube.bsky.social:

"How in-person conversations shape political polarization: Quasi-experimental evidence from a nationwide initiative"

By @ximengfang.bsky.social, Sven Heuser, & Lasse Stoetzer

www.sciencedirect.com/science/arti... #econsky

1 year ago 27 9 1 0
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“They said it could not be done”. We’re releasing Pleias 1.0, the first suite of models trained on open data (either permissibly licensed or uncopyrighted): Pleias-3b, Pleias-1b and Pleias-350m, all based on the two trillion tokens set from Common Corpus.

1 year ago 248 85 11 19
Positioning Political Texts with Large Language Models by Asking and Averaging | Political Analysis | Cambridge Core Positioning Political Texts with Large Language Models by Asking and Averaging

📢 Our new paper in Political Analysis explains how to use LLMs like GPT-4o, Llama or Mistral to estimate the ideological and policy position of political texts. Our approach is fast, reliable, cost-effective and reproducible and works with texts written in different languages 1/7 cup.org/4axBEXo

1 year ago 288 82 12 2
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Trade and globalization Greater openness to international trade has had significant impacts on the structure of the UK and other advanced economies. The role that this greater ope

The adverse effects of trade and globalization have become politically salient in a way that many of the other determinants of inequality have not. | Dimensions of Inequality: The IFS Deaton Review | academic.oup.com/ooec/article...

1 year ago 12 5 0 0
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12 Best Practices for Leveraging Generative AI in Experiment We provide twelve best practices and discuss how each practice can help researchers accurately, credibly, and ethically use Generative AI (GenAI) to enhance experimental research. We split the twelve

Posted this a few weeks ago over in Cacotopia. Including here in case people are interested in best practices to help researchers accurately, credibly, and ethically use Generative AI (GenAI) to enhance their experimental research:
ideas.repec.org/p/feb/artefa...

#EconBluesky

1 year ago 14 2 0 0
A two-panel figure illustrating the conditional effect of radical-right parties on voter turnout.

The left panel, titled "Satisfaction w/ Democracy," shows two data points:
1. For non-radical-right party supporters, the effect is slightly negative (below zero) with a small error bar.
2. For radical-right party supporters, the effect is strongly positive (above zero) with a larger error bar, indicating greater variability.

The right panel, titled "Trust in Politicians," also shows two data points:

1. For non-radical-right party supporters, the effect is negative (below zero) with a small error bar.
2. For radical-right party supporters, the effect is moderately positive (above zero) with a moderate error bar.

Both panels share the y-axis labeled "Change_After_Radical-Right_Contestation," centered around zero. Error bars in both panels represent confidence intervals.

A two-panel figure illustrating the conditional effect of radical-right parties on voter turnout. The left panel, titled "Satisfaction w/ Democracy," shows two data points: 1. For non-radical-right party supporters, the effect is slightly negative (below zero) with a small error bar. 2. For radical-right party supporters, the effect is strongly positive (above zero) with a larger error bar, indicating greater variability. The right panel, titled "Trust in Politicians," also shows two data points: 1. For non-radical-right party supporters, the effect is negative (below zero) with a small error bar. 2. For radical-right party supporters, the effect is moderately positive (above zero) with a moderate error bar. Both panels share the y-axis labeled "Change_After_Radical-Right_Contestation," centered around zero. Error bars in both panels represent confidence intervals.

New study by @nickbichay.bsky.social

Radical-Right parties participating in elections disenchant and demobilize voters, endangering (not "correcting") democracy!

RR participation in elections is associated with lower(!) turnout.

But don't RR parties bring non-voters to the ballots? Not really.

1 year ago 5 2 2 0