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Just posted: newly available aggregate state legislative chamber ideology and polarization estimates! Based on a decade plus of work with @Nolan_Mc. New data covers 1993-2022, and now contains 2,730 chamber-years. Let us know how you use our data! dataverse.harvard.edu/datase…
Boris Shor retweeted
1/3 🌟 UH Political Science Job Market Spotlight: Meet Songeun Emily Lee (@SongeunEmily), a Ph.D. candidate in methodology and American politics. Her dissertation studies how race and gender shape entry into local elections, voter evaluations, and careers in Congress.
Boris Shor retweeted
1/3 🌟 UH Political Science Job Market Spotlight: Meet Shiladitya Kumar (@ShiladityaKuma1), a Ph.D. candidate in comparative politics, political economy, and methodology. His dissertation examines candidate wealth and electoral competition in India.
Boris Shor retweeted
Missouri, October 17th, 1863.
My Dearest Margaret,
Today, across the blood-soaked fields, I beheld my brother. Though we stood beneath opposing flags, Providence had bestowed upon us the same magnificent whiskers.
The war has divided our nation, our family, and our very souls.
But not our barber.
Yours in sorrow,
Ezekiel
Boris Shor retweeted
"Everyone knows" social media gives a distorted view of public opinion (...right?). But how?
In a new paper, we trace the process of self-selection in who posts to social media, which of their opinions they choose to post about, and how this is perceived. See ⤵️ to learn more
Social media discourse is driven by false #polarization
Analyzing 1.7 million social media posts, a series of controlled experiments, and a large global survey covering 40 countries (total N = 49,222), we find that
(1) strong ideologues post their opinions significantly more often than moderate individuals
(2) extreme attitudes are posted more often than moderate attitudes.
(3) This general pattern replicates robustly across 40 countries
(4) the opinions that users post are more hostile and toxic than the beliefs they keep to themselves.
Across studies we find extreme opinions are overrepresented on social media by at least 6% and up to 22% compared to their true prevalence in our samples.
osf.io/preprints/psyarxiv/7z…
This project was led by @small_schulz and @ClaireRobertson and includes @H_Sjastad @AshuAshok @LisaFOswaldo @junghwanyang @simonsaysnothin and @andyguess
Boris Shor retweeted
Every college syllabus should include these graphs.
Use AI for homework, you will get it done faster and get a higher grade, and then get crushed on the exam.
Boris Shor retweeted
I'm thrilled to be joining @AnthropicAI to research the political economy of superintelligence. AI is progressing fast, and we have a rare opportunity to build it in ways that make free societies stronger.
I'll be conducting new research with the Rule of Law team to understand how we can design AI that bolsters democratic self-governance and enhances individual liberty. I'll be running novel agentic experiments, analyzing large-scale data, and studying what makes AI trustworthy for citizens and policymakers alike.
We’re only beginning to understand the political economy of increasingly capable AI, and there’s a much broader research agenda to develop around it. I’ll continue to run the Free Systems Lab and publish my Substack to help advance that work.
Today is my first day, and I can't wait to dive in!
Boris Shor retweeted
Political science journals: You should do this too! Maybe even (gasp) before sending out for review or as part of the review process!
Boris Shor retweeted
"Out of Step, Out of Party: Party Switching in American State Legislatures" by @bshor (@UHouston)
onlinelibrary.wiley.com/doi/…
Boris Shor retweeted
I’ve always found people who bristle at “American exceptionalism” kind of… weird. Not because I lack self-awareness — I’ve spent my career cataloging every way this country fails to live up to its own rules. But that’s exactly why I love it so damn much. We built a system designed to be shamed by its own founding documents, and it still delivered one of the most spectacular, world-altering runs in human history. A genuine force for human flourishing.
I also found the argument against American exceptionalism to be historically illiterate. Here’s a sample of what we were first at:
• The first large-scale democratic republic in human history — not a city-state, not a monarchy with a parliament bolted on, but a bold continental experiment in self-rule, popular sovereignty, and ordered liberty.
• A written Constitution (1789) with separation of powers and checks & balances — still the oldest national constitution in force anywhere.
• The Bill of Rights (1791): the first time a nation wrote “the government cannot touch these” into supreme law and actually meant it. A dare the world copied — from later rights charters to the Universal Declaration of Human Rights.
• Public land-grant universities and mass higher education (Morrill Act), opening college to ordinary people no aristocracy would have let near the gates. (but don’t get me started about what happened after we started. Massively federally funding it.)
• Kitty Hawk, 1903 — first controlled powered flight.
• The Moon, 1969 — still the only ones who’ve been there.
• The world’s largest economy since ~1890, powering unprecedented prosperity through grit and genius.
• The assembly line, skyscraper, transistor, personal computer, ARPANET — the backbone of the modern world.
• Telephone, phonograph, GPS — connecting and powering daily life.
• Surgical anesthesia, polio vaccine — saving and transforming millions of lives.
• Jazz, blues, rock ‘n’ roll — brand new American art forms that conquered the globe.
• Hollywood’s dreams, blue jeans, bourbon, and a culture so open a kid like me could devour sushi, burritos, stuffed cabbage, and tabouli in the same week and rightfully think of it all as American.
That’s the part that fills me with genuine love and pride: not just the power or the wins, but the appetite for freedom, creativity, and reinvention. The audacity to say “We the People” and keep trying to live up to it.
What do you love most about this truly exceptional country? 🇺🇸
Boris Shor retweeted
1/ I rebuilt the classic @Voteview animation for my fall Parties & Elections course: every member of Congress since 1789, one dot per member, in motion. 237 years in two and a half minutes — and the 119th shows the widest party gap in the whole series. Links/summary in replies! ⬇️⬇️⬇️
Boris Shor retweeted
New in Nature: LLMs give "the party line" in the languages of authoritarian regimes. This works when they control the media, which feeds pretraining data. We show more state control over media means less critical LLMs. 6 studies w 38 languages & 13 models. Details ↓
Boris Shor retweeted
How partisan is voting in US local elections? Our new preprint covering everything from state legislature down to hundreds of school board and local referendums: osf.io/preprints/osf/db3mj
Boris Shor retweeted
AI will make the current version obsolete. It was always a mistake to elevate higher education over the trades. But there is still real value in learning how to think critically and in understanding science.
Boris Shor retweeted
Sharing a video based on my recent @SociologicalSci article: youtu.be/5OAXBmBmQEY?si=bY5R… via @YouTube. The prominent finding that U.S. policy ignores average citizens and lower income groups results because of Simpson’s paradox. More here: medium.com/p/b60d0440e756.
Boris Shor retweeted
I used Claude Code to build an website that implements the simulations presented in "Making in the Supreme Court: The Politics of Appointments, 1930-2020" (with Chuck Cameron) that predict the composition of the Supreme Court under different scenarios.
jkastellec.github.io/msc-sim…
Boris Shor retweeted
I’ve written a comment on a recent piece by @dbroockman and @j_kalla.
I agree heartily that voters care about issues. But I don’t think that their particular explanation for the small effects of candidate moderation hold (much) water. 🧵
ctausanovitch.com/elusive_el…
Boris Shor retweeted
The mass replication studies published in Nature today are insane, exemplary and an enormous pile of work to improve science.
It's just so awesome how many people spent time on this in return to be 1/100 coauthors on a thing.
Just outstanding 🙌🙌🙌 1/
Boris Shor retweeted
We need to talk about how to cite AI polls. First image was in an @axios newsletter this morning. You'd think that's a real poll, right?
It is not. See the second image.
Journalists, PLEASE be responsible and tell people when it's AI. Always include methodology. ALWAYS.
Boris Shor retweeted
Candidates get more support by moving to the middle of voters' ideological spectrum, but that may not mean the middle among elites. Democrats benefit by moderating most where the public is more conservative, Republicans where the public is more liberal
osf.io/preprints/socarxiv/bv…



































