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Yphtach Lelkes

@ylelkes.bsky.social
4.5K followers 368 following 27 posts

associate professor, University of Pennsylvania

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Reposted by Yphtach Lelkes
Isaias Ghezae @isaiasghezae.bsky.social · 19/04/2026
🚨New Working Paper!🚨 How do Americans mentally map political coalitions? We often talk as if U.S. politics is just two sorted camps. But when people think about which groups go with which, the picture is more complicated. 🧵👇
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SICSS-Penn @sicsspenn.bsky.social · 04/02/2026
📣 CALL FOR APPLICATIONS Join us at the 2026 Summer Institute in Computational Social Science at Penn, from June 15–26! ℹ️ More info: sicss.io/2026/penn . ⏳ Deadline: Friday, March 6, 2026, at 11:59 pm EST. #SICSS #ComputationalSocialScience
sicss.io
Summer Institute in Computational Social Science
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soodoku @soodoku.bsky.social · 15/02/2025
a @github.com actions script that consults the retraction watch database and opens a PR if it sees a retracted article in .bib @ylelkes.bsky.social etc. github.com/recite/retra...
github.com
Issues · recite/retract
Github Actions to open an issue when a retracted article is discovered in a .bib file - Issues · recite/retract
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Derek Holliday @derekholliday.com · 22/11/2024
In our PNAS we don't necessarily find a negative relationship between affpol and antidemocratic norm support, but certainly a non-linear one (appendix fig. below). Personally, I think FT measures have some pretty major empirical oddities we're still evaluating 🔗 www.pnas.org/doi/10.1073/...
Non-linear relationship between affective polarization and support for 4 antidemocratic norms
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Sarah J. Jackson @sjjphd.bsky.social · 06/06/2024
Can’t believe this isn’t satire
Screenshot of an email from my university saying: “Today, we write to share two important updates about Penn’s policies and procedures for when, where, and how open expression can take place.”
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Mollie Wilson O'Reilly @mollieoreilly.bsky.social · 18/05/2024
I definitely assumed the weapons the cops "took off the streets" were being destroyed, not returned to the streets for profit. I don't know WHY I assumed harm was actually being reduced, but I know better now!
Newark Police have proudly taken guns off the street for years through gun buybacks. But at the same time they have inadvertently put their own weapons back in circulation.

The Newark Police Department confirmed that they traded-in about a thousand guns in 2016 and 2017 to a firearms dealer, in exchange for discounts on new equipment. That dealer then resells the weapons.
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Peter @notalawyer.bsky.social · 18/05/2024
this dude is basically the nation’s leading expert on legal ethics, we are so cooked.
But Stephen Gillers, an expert in judicial ethics at New York University's law school, disagreed, noting that the test in the recusal statute is based on the perspective of a fair-minded person who has all the facts.
"I don't think such an objective observer would question Alito's impartiality based on this incident," Gillers said in an email. "I find it impossible to believe that Alito knew the flag was flying upside down or, if he did know, that he knew the relationship to 'Stop the Steal.' I don't believe he would have allowed this to happen otherwise."
Gillers added that while Alito's explanation for how it happened is "hard to believe, it is more credible than the view that he knowingly chose to fly the flag upside down knowing its political message."
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Jacob T. Levy @jacobtlevy.bsky.social · 28/04/2024
This concern is not *why* I adopted quizzes this year, but I can report: I said explicitly that lectures were meant to help students do and understand the reading, not to substitute for it, and that quizzes would be be about the reading, not about the lectures. On the first quiz of the term...
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Adam Serwer @adamserwer.bsky.social · 24/04/2024
Here’s what the national guard bullshit is really about. www.theatlantic.com/ideas/archiv...
As we approach the summer of 2024, the economy is growing, migration to the border has declined at least temporarily owing to what appears to be a new crackdown by Mexican authorities, and in many major cities, crime is returning to historic lows, leaving protests as the most suitable target for demagoguery. The Biden administration’s support for Israel divides Democrats and unites Republicans, so the longer the issue remains salient, the better it is for the GOP. More broadly, the politics of “American carnage” do not work as well in the absence of carnage. Far-right politics operate best when there is a public perception of disorder and chaos, an atmosphere in which the only solution such politicians ever offer can sound appealing to desperate voters. Social-media bubbles can suffice to maintain this sense of siege among the extremely online, but cultivating this perception among most voters demands constant reinforcement.
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Carlisle Rainey 👨‍💻📊📚 @carlislerainey.bsky.social · 23/04/2024
Luskin's "Robert's Rules: Suggestions for Writing" has some excellent, pithy advice for academic writers. #polisky PDF: github.com/soodoku/on-w...
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Jay Rosen @jayrosen.bsky.social · 16/04/2024
At NPR... "I and a couple of other editorial leaders were encouraged to make sure that any coverage of a Trump lie was matched with a story about a lie from Hillary Clinton. Another colleague asked what to do if one candidate just lied more than the other." Silence. slate.com/business/202...
slate.com
NPR Is a Mess. But “Wokeness” Isn’t the Problem.
The real story behind the public broadcaster’s woes.
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Nick Davis @ntd.bsky.social · 10/04/2024
americans (reps+dems) dislike norm violations. but some (reps) still vote for norm-breakers. so we're back at vote choice. again. not public opinion abt norm-violations. vote choice. back-sliding is an elite-constraint problem; cant public opinion way out of it. paper: tinyurl.com/normviopubop...
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Drew Engelhardt @amengel.bsky.social · 30/03/2024
Learned about this history of the ANES W. Miller wrote from @ylelkes.bsky.social yesterday. So many fascinating bits in here, including the ANES existing in part b/c it got the 1948 margin ~right, and due to chance inclusion of a vote choice item. ejpr.onlinelibrary.wiley.com/doi/10.1111/...
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Derek Holliday @derekholliday.com · 18/03/2024
So happy to see this now published at PNAS! This paper, coauthored with Shanto Iyengar, @ylelkes.bsky.social, and Sean Westwood, was my first project for @prl.bsky.social, and there will be many more coming soon! 🥳 www.pnas.org/doi/10.1073/...
pnas.org
PNAS
Proceedings of the National Academy of Sciences (PNAS), a peer reviewed journal of the National Academy of Sciences (NAS) - an authoritative source of high-impact, original research that broadly spans...
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Troels Bøggild @tboeggild.bsky.social · 12/03/2024
We're looking for candidates who hold or are close to getting a PhD in political science, psychology, communication, cognitive science or similar Please get in touch if interested!   Team @leneaaroe.bsky.social @boralexander.bsky.social @mattlevendusky.bsky.social @ylelkes.bsky.social Vin Arceneaux
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Troels Bøggild @tboeggild.bsky.social · 12/03/2024
🚨JOB ALERT🚨 I'm hiring two postdocs (2-3 years) for a research project on political polarization hosted at @aarhusuni.bsky.social Application deadline August 15, starting date October 1 or later. Please help share widely! polisky #AcademicSky #PhDChat international.au.dk/about/profil...
international.au.dk
Two postdoctoral positions in research project on political polarization at Aarhus University - Vacancy at Aarhus University
Vacancy at Department of Political Science, Aarhus University
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Drew Engelhardt @amengel.bsky.social · 11/03/2024
Cheers to Vin, @bnbakker.bsky.social, Neil, and @ylelkes.bsky.social for this. Much needed. onlinelibrary.wiley.com/doi/10.1111/...
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Dan Hopkins @dhopkins1776.bsky.social · 31/01/2024
Why have the @nytimes.com & others covered the tumult at Harvard & Penn so much? @ylelkes.bsky.social, Sam Wolken & I provide an answer in a new @ajpseditor.bsky.social "The Rise of and Demand for Identity-Oriented Media Coverage": papers.ssrn.com/sol3/papers.... www.nytimes.com/2024/01/28/u...
nytimes.com
The Campus Wars Aren’t About Gender … Are They?
Recent Ivy League dramas have made women leaders in academia wonder how far they’ve really come.
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British Journal of Political Science @bjpols.bsky.social · 16/01/2024
#OpenAccess from our new issue - Ancestral Kinship and the Origins of Ideology - cup.org/3vctG5k - Neil Fasching & @ylelkes.bsky.social
British Journal of Political Science Fasching & Yelkes abstract graphic
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Todd Tucker @toddntucker.com · 23/12/2023
Solow "rarely used email. He offered this “economist’s explanation” of his distaste for electronic correspondence in the 2014 interview for this obituary: “If you make communications costless, you will get messages of zero value.” www.washingtonpost.com/obituaries/2...
washingtonpost.com
Robert Solow, Nobel-winning economist who studied tech, dies at 99
Robert M. Solow’s economic research made him a respected voice on public policy, particularly on matters of employment.
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Chris Warshaw @chriswarshaw.bsky.social · 19/12/2023
Our paper introducing the "American Local Government Elections Database" is online at Scientific Data. The data includes 78,000 candidates in 57,000 electoral contests in races for seven distinct local political offices in most medium and large cities and counties over the last three decades.
nature.com
American local government elections database - Scientific Data
Scientific Data - American local government elections database
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Yphtach Lelkes @ylelkes.bsky.social · 15/12/2023
last day to apply for the PRL meeting in NOLA. We welcome work in the areas of partisan animosity and democratic attitudes, broadly defined, and from any discipline. We cover flight and accomodations for accepted papers.
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Carlisle Rainey 👨‍💻📊📚 @carlislerainey.bsky.social · 13/12/2023
"Papers and patents are becoming less disruptive over time" www.nature.com/artic...
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Yphtach Lelkes @ylelkes.bsky.social · 12/12/2023
A few days left to apply to the conference in NOLA. We take an expansive view of the topic, and are interested in things related to Democratic attitudes, perceptions, beliefs etc, from any discipline.
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Catherine Newmark @cnewmark.bsky.social · 05/11/2023
Seyla Benhabib. medium.com/amor-mundi/a...
medium.com
An Open Letter To My Friends Who Signed “Philosophy for Palestine”
Seyla Benhabib
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Chris Claassen @chrisclaassen.bsky.social · 06/11/2023
Public support for democracy is crucial to prevent backsliding. But existing survey questions focusing on “democracy” may not measure the concept well, as the term “democracy” varies in meaning and may prompt social desirability. polisky 1/3
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Yphtach Lelkes @ylelkes.bsky.social · 03/11/2023
Can think of at least one confound that increased news interest around 2016 and no longer commanded attention post 2020.
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Danbischof @danbischof.bsky.social · 31/10/2023
In general a good approach to block copy-paste for open questions in surveys. I have used this for pretty much all open questions in my surveys.
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Yphtach Lelkes @ylelkes.bsky.social · 31/10/2023
Cross posting this from the other site, before a reviewer points to that paper in an experiment. The 40% number comes from low paying annotation tasks
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Erol Akcay @akcay.theoretical.bio · 23/10/2023
The right kind of mask worn, and worn the right way works as a matter of physics. But this gets lost in the conflation with what policy and individual choices do with masks, which is more complicated.
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Claire Adida @claireadida.bsky.social · 23/10/2023
plus, there IS an RCT on this! www.science.org/doi/10.1126/...
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Yphtach Lelkes @ylelkes.bsky.social · 23/10/2023
I am pro masking but this isn’t convincing evidence
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Marc Somssich @somssich.bsky.social · 13/10/2023
📜 Understanding and combatting misinformation across 16 countries on six continents 🧑‍🔬 Antonio A. Arechar, Gordon Pennycook & David G. Rand et al. 📔 Nature Human Behaviour 🔗 www.nature.com/articles/s41... #️⃣ (Feeds) #SciComm #ScienceCommunication
nature.com
Understanding and combatting misinformation across 16 countries on six continents - Nature Human Beh...
Across 16 countries, this research finds consistent cognitive and social predictors of COVID-19 misinformation susceptibility, and shows how accuracy prompts and literacy tips reduce misinformation sh...
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Thomas Sattler @sattlersthomas.bsky.social · 19/10/2023
Our paper on the effect of fiscal austerity on political polarization is now officially published in the current issue of @bjpols.bsky.social: www.cambridge.org/core/journal... With @evehubscher.bsky.social and @markuswagner.bsky.social
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Polarization Research Lab @prl.bsky.social · 02/10/2023
PRL is excited to announce our 2nd Annual Meeting in New Orleans on March 21-22! Applications to present will open on our website on Nov 1. Hint: strong submissions will include a draft paper. We hope you'll apply! PS it's fully funded ✈️ polarizationresearchlab.org/annual-meeti...
polarizationresearchlab.org
Annual Meeting
Meetings and Events   Annual Meetings The 2024 PRL Annual Meeting will take place in New Orleans on March 21-22, 2024!  This boutique conference brings together the best and most innovative wo…
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Josh McCrain @joshmccrain.bsky.social · 02/10/2023
Polisky -- New working paper! Patrolling the Police: Experimental Evidence on Police Executives' Support for Oversight with Ian Adams, Kaylyn Jackson Schiff, Daniell Schiff and Scott Mourtgos www.crimrxiv.com/pub/6jei4ux6...
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Derek Holliday @derekholliday.com · 26/09/2023
NYT: "Other studies have found that any effects from the indictments dissipated quickly, and that there is little evidence of any increase in the numbers of Americans supportive of a violent response." That's us! We're the linked other studies (w/ @ylelkes.bsky.social and Sean Westwood)!
nytimes.com
As Trump Prosecutions Move Forward, Threats and Concerns Increase
As criminal cases proceed against the former president, heated rhetoric and anger among his supporters have the authorities worried about the risk of political dissent becoming deadly.
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Ross Dahlke @rossdahlke.bsky.social · 21/09/2023
New work from Hopkins, @ylelkes.bsky.social & Wolken finds that identity-oriented media coverage is on the rise. Why? Audience demand for such content. Really cool paper that looks at many datasets and places media consumers as empowered actors in changing media papers.ssrn.com/sol3/papers....
Figure 1: Mentions of identities over timeFigure 4: Over-time frequency of identity content in Facebook blurbsFigure 3: Incidence of social identity language by outlets on TwitterFigure 6: Average increase in engagement for tweets and Facebook URLs that include social identity language compared with posts that do not
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