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David Broockman @dbroockman.bsky.social · 16/03/2026

New short paper w @jkalla.bsky.social ! Candidates gain from moderation, but less than many theories expect. Many conclude voters must not care about issues. This is wrong. Small *average* effects mask large effects on specific issues & are consistent with widespread issue-based voting 🧵

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Reposted by David Broockman

David Broockman @dbroockman.bsky.social · 28/11/2025

Writing your students grad school rec letters? Encourage them to also apply for our political science predoc position at UC Berkeley! aprecruit.berkeley.edu/JPF05187

aprecruit.berkeley.edu

Junior or Assistant Specialist - Department of Political Science

University of California, Berkeley is hiring. Apply now!

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Reposted by David Broockman

Martin Saveski @msaveski.bsky.social · 01/12/2025

New paper in Science: In a platform-independent field experiment, we show that reranking content expressing antidemocratic attitudes and partisan animosity in social media feeds alters affective polarization. 🧵

Today, social media platforms hold the sole power to study the effects of feed-ranking algorithms. We developed a platform-independent method that reranks participants’ feeds in real time and used this method to conduct a preregistered 10-day field experiment with 1256 participants on X during the 2024 US presidential campaign. Our experiment used a large language model to rerank posts that expressed antidemocratic attitudes and partisan animosity (AAPA). Decreasing or increasing AAPA exposure shifted out-party partisan animosity by more than 2 points on a 100-point feeling thermometer, with no detectable differences across party lines, providing causal evidence that exposure to AAPA content alters affective polarization. This work establishes a method to study feed algorithms without requiring platform cooperation, enabling independent evaluation of ranking interventions in naturalistic settings.

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David Broockman @dbroockman.bsky.social · 28/11/2025

Writing your students grad school rec letters? Encourage them to also apply for our political science predoc position at UC Berkeley! aprecruit.berkeley.edu/JPF05187

aprecruit.berkeley.edu

Junior or Assistant Specialist - Department of Political Science

University of California, Berkeley is hiring. Apply now!

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Reposted by David Broockman

Stephen Jacob Smith @stephenjacobsmith.com · 27/11/2025

Still thinking about this article. It’s always been a sore spot in YIMBY circles that so many progressive foundations pour money into NIMBYism, and I’m glad it’s finally being aired in public. Keep talking about it. www.insidephilanthropy.com/home/philant...

insidephilanthropy.com

Philanthropy Needs to Pick a Side on the Housing Construction Debate

Despite California’s severe housing shortage, foundations are still funding on the wrong side of the housing fight there, guest author Ned Resnikoff writes.

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David Broockman @dbroockman.bsky.social · 25/11/2025

NEW PAPER w/ @cselmendorf.bsky.social & @jkalla.bsky.social: An under-appreciated reason why voters oppose dense new housing, especially in less-dense neighborhoods: they think it looks ugly and want to prevent that, even in other neighborhoods. Some of what we think is NIMBYism might not be!

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David Broockman @dbroockman.bsky.social · 15/07/2025

UC Berkeley is hiring an Assistant Professor this fall, with a preference for candidates in International Relations, American Politics, or Public Law. I am on the committee and glad to answer questions. Please apply! aprecruit.berkeley.edu/JPF04948

aprecruit.berkeley.edu

Assistant Professor - Department of Political Science

University of California, Berkeley is hiring. Apply now!

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David Broockman @dbroockman.bsky.social · 12/06/2025

My Chinese school made a fun video about my Chinese learning journey. Don’t judge the pronunciation, it was filmed in 2023! 🙈 youtube.com/watch?v=Ay4D...

m.youtube.com

Dr. David Broockman's Learning Journey (Chinese-Speaking Version)

YouTube video by Chinese Language Academy

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Reposted by David Broockman

Omar Wasow @owasow.bsky.social · 31/05/2025

Trump administration: We’ll beat China by destroying everything that makes us competitive with China.

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David Broockman @dbroockman.bsky.social · 27/05/2025

🚨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🧵👇

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David Broockman @dbroockman.bsky.social · 12/05/2025

Apparently my work on ideology is coming up in TikToks to justify the idea that extreme positions gain votes. For the record, I don't think my work indicates this. Rather, it suggests that the most advantageous moderation is on the specific issues where a party is out of step with public opinion.

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David Broockman @dbroockman.bsky.social · 09/04/2025

Interesting that I’m not seeing takes that this will help Trump politically because 1) moving to the extremes will turn out his base and/or 2) economic reality doesn’t matter, only elite messaging about the economy. Makes you think.

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David Broockman @dbroockman.bsky.social · 12/03/2025

The Berkeley Center for American Democracy is hiring a predoc next year. Please encourage any students interested in PhD study in political science to apply! aprecruit.berkeley.edu/JPF04782

aprecruit.berkeley.edu

Junior or Assistant Specialist - Department of Political Science

University of California, Berkeley is hiring. Apply now!

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David Broockman @dbroockman.bsky.social · 02/12/2024

🚨 NEW PAPER: When low-income Americans get $1,000/month for 3 years, what happens to their political views & behavior? The OpenResearch Unconditional income Study reveals surprising findings about the effects of income on politics... 🧵

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David Broockman @dbroockman.bsky.social · 20/11/2024

With Fox News hosts nominated for the cabinet, I wanted to share takeaways from two recently-accepted papers w @jkalla.bsky.social on partisan TV. There's been much skepticism that partisan TV actually affects public opinion. Our findings rebut that skepticism: partisan media matters! 🧵

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