Sign in

Alex Coppock

@aecoppock.bsky.social
6.7K followers 1.5K following 636 posts

Associate Professor of Political Science at Northwestern University alexandercoppock.com Persuasion in Parallel: alexandercoppock.com/coppock_2022.h… Research Design: Declaration, Diagnosis, and Redesign: book.declaredesign.org

PostsRepliesMedia
Alex Coppock @aecoppock.bsky.social · 2h
New from Hainmueller and Laitin on the causal effects of becoming a citizen on wages. Short story: the observational ests overstate the premium relative to the experimental ests. Authors conclude "observational averages should not be used as causal forecasts for policy" doi.org/10.1073/pnas...
screen shot of the article with "observational averages shouldnot be used as causal forecasts for policy" highlighted
1129
Alex Coppock @aecoppock.bsky.social · 11/09/2026
When oh when will polling outfits stop asking "more/less likely" questions? No way does this promise make 27% of the country *much less likely* to vote R, No way does this promise make a different 11% of the country *much more likely* to vote R!
030
Reposted by Alex Coppock
Florian Foos @florianfoos.bsky.social · 21/08/2026
Applications are open for EuroWEPS Berlin.👇There is also some change in the EuroWEPS organising committee. @pavisuri.bsky.social is taking a step back, while @aalrababah.bsky.social & @ewirsching.bsky.social are joining starting with this edition. A big thank you to Pavi & welcome to Ala and Elisa!
12110
Reposted by Alex Coppock
Gustavo Diaz @gustavodiaz.org · 12/08/2026
Not on the committee but happy to chat!
041
Reposted by Alex Coppock
Martin Naunov @naunovmartin.bsky.social · 12/08/2026
Northwestern poli sci is hiring in quant methods! I'm not on the committee, but I AM excited to welcome new junior colleagues. We're also hiring in IR -- separate search, same amazing department (and university!)
053
Alex Coppock @aecoppock.bsky.social · 12/08/2026
Northwestern is hiring in quant methods (assistant level, tenure track) Please repost and share with those you think would be good candidates, thank you! polisci.northwestern.edu/about/facult... #psjobs #psjminfo #poliscijobs
Assistant Professor of Quantitative Political Methodology (Tenure-Track)
The Department of Political Science at Northwestern University invites applications for a full-time position in Quantitative Political Methodology at the rank of Assistant Professor, tenure-track, to begin Fall 2027. We emphasize methodology with a strongly applied perspective: successful candidates will maintain an active, independent research program that includes methodological contributions in their own right, while also teaching quantitative research methods courses at the undergraduate and graduate levels and applying those methods to substantive questions in their area of expertise. We are especially interested in candidates whose work bridges data-driven/computational approaches with design-based inference, though we welcome applicants making cutting-edge contributions in either of these traditions or in other areas of political methodology. Successful candidates' substantive research agendas may be in any area of political science or may cross boundaries; as with all Northwestern faculty, successful candidates will be expected to provide service to the department, the university, and the profession.Aerial photo of Northwestern's beautiful lakeside campus with political science's new building circled
04133
Alex Coppock @aecoppock.bsky.social · 28/07/2026
Just an enormous difference in Russian support for the war when comparing direct question estimates with experiments from list experiments. Also, peep those CIs! sensitivity bias has to be HUGE (which it apparently is in this case) to be detected with Direct - List
32611
Alex Coppock @aecoppock.bsky.social · 24/06/2026
Our (with Radha Sarkar) meta-reanalysis of the experimental religion and politics literature is now out at @apsrjournal.bsky.social Open-access link: doi.org/10.1017/S000... Brief thread
title page of journal, that reads:

The effects of religious messages and endorsements on political attitudes: A meta-reanalysis
Sarkar, Radha, Coppock, Alexander. 2026. The effects of religious messages and endorsements on political attitudes: A meta-reanalysis. American Political Science Review.

Abstract
The experimental study of the effects of religious messages and endorsements by religious leaders on political attitudes has a relatively short history yet has coalesced around three main claims: religious treatments are especially effective because of their religious character, effects are larger for religious affiliates than nonaffiliates, and effects are larger for high religiosity types than low religiosity types. Here we meta re-analyze the experimental record (58 treatment-outcome pairs drawn from 43 studies reported in 26 papers) to probe the generalizability of these claims. Our findings indicate that these three headline claims do not generalize straightforwardly across contexts: effects are large in some cases and close to zero in others, and we find no evidence in favor of the claimed heterogeneities by religious affiliation or religiosity. Based on a census of the estimands in this literature, we offer suggestions for future research that would enhance commensurability and synthesis.
12715
Reposted by Alex Coppock
Sofia Elverdin @sofiaelverdin.bsky.social · 12/06/2026
I'm thrilled to share that my dissertation has been selected as the co-winner of the Best Dissertation Award from the APSA Women, Gender, and Politics Section. Many thanks to the award committee, and to mentors and colleagues who offered support along the way!
1121
Alex Coppock @aecoppock.bsky.social · 05/06/2026
I really hope that Sociology reforms. My main work is reanalyzing other scholars' experiments in service of meta-analysis. It's only possible because transparency is embraced so thoroughly by our political science community. Most exps are posted; i'm getting ~80% when I email for the rest.
0165
Reposted by Alex Coppock
Mashail Malik @mamalik.bsky.social · 01/06/2026
We have a new paper out on what the large conjoint literature tells us about public opinion on immigrant characteristics:
1163
Reposted by Alex Coppock
Marcel Roman @mfroman.bsky.social · 27/05/2026
🚨NEW PUBLICATION🚨 in Science Advances. We meta-reanalyze 100 conjoint experiments to assess which immigrants citizens prefer around the world. Our evidence reinforces existing findings, identifies novel insights, and provides a basis for future research 1/n www.science.org/doi/10.1126/...
science.org
Which immigrants do citizens prefer? A meta-reanalysis of 100 conjoint experiments
Meta-reanalysis of 100 conjoint experiments reveals patterns of similarity and variation in public immigration preferences worldwide.
15828
Reposted by Alex Coppock
Department of Comparative Politics UiB @sampol.bsky.social · 26/05/2026
🌟 New article 👥 Eelco Harteveld, Lars Erik Berntzen, Andrej Kokkonen, Haylee Kelsall, Jonas Linde & Stefan Dahlberg 👉 The (alleged) consequences of affective polarization: A survey experiment in nine democracies 📗 European Journal of Political Research 🔗 www.cambridge.org/core/journal...
01810
Reposted by Alex Coppock
Martin Naunov @naunovmartin.bsky.social · 15/05/2026
Thrilled this is finally out in its JOP-formatted version! Hope it's useful to anyone working on LGBT politics, (electoral) discrimination, status differentials within & across identity categories, and non-textual experiments. Main findings in quoted thread. www.journals.uchicago.edu/doi/epdf/10....
02413
Reposted by Alex Coppock
Marko Bajlovic @marko.tech · 17/05/2026
753253
Reposted by Alex Coppock
Julia M. Rohrer @dingdingpeng.the100.ci · 11/05/2026
He talked about description as well, including the specific recommendation to avoid associational language, simply because it has become so ambiguous (so not "is SES associated with Y" but rather: do people of different SES differ on average in Y).>
162
Reposted by Alex Coppock
APSA @apsa.bsky.social · 30/04/2026
Read this #OpenAccess article by Amanda Sahar d’Urso in American Political Science Review, "What Happens When You Can’t Check the Box? Categorization Threat and Public Opinion among Middle Eastern and North African Americans"
politicalsciencenow.com
What Happens When You Can’t Check the Box? Categorization Threat and Public Opinion among Middle Eastern and North African Americans
What Happens When You Can’t Check the Box? Categorization Threat and Public Opinion among Middle Eastern and North African Americans By Amanda Sahar d’Urso, Georgetown University Middle Eastern and North African (MENA) Americans are politically visible yet institutionally invisible, long categorized as “white” by the U.S. government despite neither self-categorizing nor racially assigned as such. Most forms—across public and private sectors—still lack a “MENA” category option.
032
Reposted by Alex Coppock
Rafe Meager (they/them) @economeager.bsky.social · 27/04/2026
this is so interesting, i think this is basically a kind of ecological study
1478
Reposted by Alex Coppock
Robb Willer @robbwiller.bsky.social · 22/04/2026
Climate change impacts are here, but public support for action remains polarized. Which climate messages move people? In a ~13,500-person megastudy, we tested 10 of the most-cited messages. Six increased pro-environmental attitudes in the U.S.—but only by 1–4 percentage points. 🧵
611846
Reposted by Alex Coppock
Ariel Edwards-Levy @aedwardslevy.bsky.social · 21/04/2026
Once again asking people not to post about poll results without links to the surveys, and not to repost anything that cites poll results without links to the surveys. This is not (primarily) about credit, it's a data credibility check.
518133
Alex Coppock @aecoppock.bsky.social · 08/04/2026
Friends, you've been submitting great proposals for this project and we're now coming up to capacity. We're closing proposals on April 15th; please send yours in!
0138
Alex Coppock @aecoppock.bsky.social · 08/04/2026
Nice new entry in the persistence literature
040
Reposted by Alex Coppock
Institute for Replication @i4replication.bsky.social · 01/04/2026
🧵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 👇
216989
Reposted by Alex Coppock
American Political Science Review @apsrjournal.bsky.social · 24/03/2026
From our FirstView article: What Happens When You Can’t Check the Box? Categorization Threat and Public Opinion among Middle Eastern and North African Americans by @asdurso.bsky.social. doi.org/10.1017/S000...
doi.org
What Happens When You Can’t Check the Box? Categorization Threat and Public Opinion among Middle Eastern and North African Americans | American Political Science Review | Cambridge Core
What Happens When You Can’t Check the Box? Categorization Threat and Public Opinion among Middle Eastern and North African Americans
0177
Reposted by Alex Coppock
Julia M. Rohrer @dingdingpeng.the100.ci · 21/03/2026
Psychology has a whole cottage industry in which people come up with some construct that is essentially "attitudes/beliefs/expectations/feelings about X", and then the central claim is that this construct is a super important determinant of future X outcomes.>
1416837
Reposted by Alex Coppock
Lisa Oswald @lfoswaldo.bsky.social · 18/03/2026
I'm hiring a postdoc! @goetheuni.bsky.social Focus: CSS, political behavior, political communication & transforming information environments. 📍 Frankfurt | ⏳ 3 years | 📅 Deadline: 14 April 2026 Full job ad here: www.uni-frankfurt.de/48794987/Zen... (search for “political behavior” to find it)
uni-frankfurt.de
Goethe-Universität — Zentrale Einrichtungen
Die Goethe-Universität ist eine forschungsstarke Hochschule in der europäischen Finanzmetropole Frankfurt. Lebendig, urban und weltoffen besitzt sie als Stiftungsuniversität ein einzigartiges Maß an E...
06351
Alex Coppock @aecoppock.bsky.social · 19/03/2026
New paper with Don Green and @ethanvporter.bsky.social in the QJPS. After much deliberation, we went with a title that just states the result. 📝 journal: www.emerald.com/qjps/article...
abstract: While attempts to change Americans’ partisanship via persuasive treatments largely fail, partisanship can and does change over time. In this paper, the authors first confirm, via survey and field experiments, that typical campaign messaging in the United States does not budge partisanship. The authors then present experiments in which participants encounter extraordinary hypothetical scenarios (e.g. one party causes economic collapse) before reporting what their partisanship would be under such circumstances. Twelve percent of partisans imagine switching parties in the pro-out-party hypothetical conditions, compared with 5% in the control hypotheticals in which the status quo persists, for a seven-percentage point (SE 1.5 points) difference. These hypothetical shifts are on par with the largest changes in American macropartisanship ever recorded. While the act of ruminating on hypothetical scenarios is not followed by changes in partisanship measured post-treatment, the evidence suggests that extraordinary world events may be able to shift partisan affiliation.
24620
Alex Coppock @aecoppock.bsky.social · 09/03/2026
Congratulations to @yamilrvelez.bsky.social, @patrickpliu.bsky.social, and @scottclifford.bsky.social ! we think attitudes are some function of beliefs; our exps routinely move beliefs but not (even correlated) attitudes. This team found a way to guess which beliefs matter more (and they do!)
1257
Reposted by Alex Coppock
Julia M. Rohrer @dingdingpeng.the100.ci · 05/03/2026
P.S. Pre-post differences are *not* valid treatment effect estimates. Why? Here's a post by @statsepi.bsky.social: statsepi.substack.com/p/one-simple..., here's a post by me: www.the100.ci/2025/01/22/r... >
the100.ci
Reviewer notes: In a randomized experiment, the pre-post differences are not effect estimates
Reviewer notes are a new short format with brief explanations of basic ideas that might come in handy during (for example) the peer-review process. They are a great way to keep Julia from writing 10,0...
23116
Alex Coppock @aecoppock.bsky.social · 27/02/2026
Writing simulations in DeclareDesign just went from "I should do that, but it's kind of a lot of work" to extremely easy
Screenshot of claude just writing a design no trouble
46110
Reposted by Alex Coppock
Gwyneth McClendon @gmcclendon.bsky.social · 24/02/2026
Reminder to register (no fee) for the Rebecca Morton experiments conference at NYU taking place next week. Join us: nyu.qualtrics.com/jfe/form/SV_...
nyu.qualtrics.com
Survey | Qualtrics Survey Software
Survey Software, Enterprise Survey software for enterprise feedback management and CRM solutions. Enables high-quality data collection, panel management and results analysis. Perfect for market resear...
043
Reposted by Alex Coppock
Julia M. Rohrer @dingdingpeng.the100.ci · 25/02/2026
Per protocol analysis strikes again! Folks, if you randomize but then don‘t analyze some of the people who got randomized (maybe because they didn’t adhere to instructions, maybe because they dropped out), randomization will no longer do all the heavy causal inference lifting.
618756
Alex Coppock @aecoppock.bsky.social · 24/02/2026
me typing "claude"
media.tenor.com
a cartoon of mickey mouse in a wizard outfit
ALT: a cartoon of mickey mouse in a wizard outfit
050
Alex Coppock @aecoppock.bsky.social · 23/02/2026
*maybe* this journal mistakenly thought the author submitted a registered report (or similar). But if the position is "papers must not be pre-registered" I'd love to hear the justification.
121
Alex Coppock @aecoppock.bsky.social · 19/02/2026
Thank you for all the support and reposts! We've gotten a steady stream of inquiries and submissions for this competition, but also some ANXIETY that the window will close before people have a chance to submit. We're nowhere near that! We'll update on here when we've allocated 50% of the capacity.
0219
Reposted by Alex Coppock
Andrew Trexler @atrexler.com · 12/02/2026
Very excited to see this out at @bjpols.bsky.social! In this article, I show that contemporary political news coverage makes it challenging for readers to learn information that is helpful for democratic accountability, even for very politically engaged audiences. A brief summary:
12919
Alex Coppock @aecoppock.bsky.social · 13/02/2026
Penelope Van Grinsven and Lilly Zuckerman curate Above Board Ceramics -- this year's show is now live and is fabulous. www.aboveboardceramics.com [disclosure Penny and I are married!]
160
Alex Coppock @aecoppock.bsky.social · 12/02/2026
highly recommend this paper. the experimental design manipulates how much subjects are monitored; when asked, yes treated subjects feel more monitored. Do they later give different responses on possibly sensitive topics? no they don't.
1111
Reposted by Alex Coppock
Kevin Collins @kwcollins.bsky.social · 03/02/2026
Interesting paper, especially interesting it's coming from researchers at Anthropic arxiv.org/pdf/2601.20245
How AI Impacts Skill Formation
Judy Hanwen Shen∗ Alex Tamkin†
February 3, 2026
Abstract
AI assistance produces significant productivity gains across professional domains, particularly for
novice workers. Yet how this assistance affects the development of skills required to effectively supervise
AI remains unclear. Novice workers who rely heavily on AI to complete unfamiliar tasks may compromise
their own skill acquisition in the process. We conduct randomized experiments to study how developers
gained mastery of a new asynchronous programming library with and without the assistance of AI.
We find that AI use impairs conceptual understanding, code reading, and debugging abilities, without
delivering significant efficiency gains on average. Participants who fully delegated coding tasks showed
some productivity improvements, but at the cost of learning the library. We identify six distinct AI
interaction patterns, three of which involve cognitive engagement and preserve learning outcomes even
when participants receive AI assistance. Our findings suggest that AI-enhanced productivity is not a
shortcut to competence and AI assistance should be carefully adopted into workflows to preserve skill
formation – particularly in safety-critical domains.
36631
Reposted by Alex Coppock
Thomas J Wood @thomasjwood.bsky.social · 02/02/2026
Among the most vivid declines in the American people's trust -- their diminished trust in other people. Data from @gallup.com's Social Series.
072
Alex Coppock @aecoppock.bsky.social · 27/01/2026
🎺 Call for proposals 🎺 1️⃣ replicate an existing experiment 2️⃣ run a novel experiment on repdata.com 3️⃣ coauthor with Mary McGrath and me to meta-analyze the replications and existing studies 4️⃣ publish your study details: alexandercoppock.com/replication_... applications open Feb 1 please repost!
Call for Proposals: Data Collection for
Replication+Novel Political Science Survey Experiments
Alexander Coppock and Mary McGrath
January 27, 2026
We invite proposals for a survey experiment replication+novel design competition. Se-
lected replication+novel design survey experiments will be conducted on large samples of
American respondents, quota sampled to match U.S. Census margins and filtered for quality
and attention by the survey sample provider Rep Data (repdata.com).
Each proposal consists of two parts: (1) a replication study of an existing, previously
published survey experiment, and (2) a novel experimental design on a topic of the authors’
choosing.
The replication studies and reanalyses of the existing studies will be combined into a
meta-paper to be co-authored by all authors of accepted proposals along with the princi-
pal investigators (Coppock and McGrath). As a condition for acceptance, authors commit
to sharing the data and producing a write-up of the findings from their novel design for
submission to a scholarly journal, and public posting of a working paper pre-publication.
08071
Reposted by Alex Coppock
Drew Stommes @drewstommes.bsky.social · 27/01/2026
After years in academia, I’m exploring data science and research roles in industry. I'm a quant. social scientist (PhD Yale ’24, NYU) focused on causal inference, experiments, and large-scale data. Feel free to get in touch or share; all leads appreciated. dwstommes@gmail.com
03120
Reposted by Alex Coppock
Gwyneth McClendon @gmcclendon.bsky.social · 27/01/2026
JOIN us for this year’s Rebecca Morton conference on experimental political science at NYU! March 6-7. We have a great line up of papers and posters! Program (scroll down) here: wp.nyu.edu/cesspolitica... Register (no fee) here: nyu.qualtrics.com/jfe/form/SV_...
wp.nyu.edu
Annual NYU CESS Experimental Political Science Conference
11819
Reposted by Alex Coppock
Guy Grossman @guygrossman.bsky.social · 25/01/2026
Many of us separate between "family photos", social media (e.g., FB/Insta), and political opinions (BS/Threads). Today is a good time to post on "family" social media so our Trump-voting family and friends understand how mad we are, and to puncture their information bubble.
3419
Reposted by Alex Coppock
APSA Experimental Research Section @experimentsapsa.bsky.social · 21/01/2026
The section is searching for new editors for @jepsjournal.bsky.social ! Please check out the call here, and circulate widely: connect.apsanet.org/s42/editor-s...
connect.apsanet.org
Editor Search
0610
Reposted by Alex Coppock
Kevin Collins @kwcollins.bsky.social · 08/01/2026
I need everyone in the political communications world who found the moral foundations reframing approach promising (which includes me) to read this paper It doesn't replicate in new research. It just doesn't work. www.tandfonline.com/doi/full/10....
tandfonline.com
The Poverty of Moral Foundation Messaging
Prominent scholars have argued that reframing political positions and issues in terms of moral foundations that appeal to conservatives or liberals can attract more individual-level support for tho...
45719
Reposted by Alex Coppock
Sumitra Badrinathan @sumitra.bsky.social · 07/01/2026
new vox dev piece on our recent RCT to counter misinformation in classrooms in india:
1167
Alex Coppock @aecoppock.bsky.social · 04/01/2026
RIP. Learned so much from this community. Here's my best-performing SO question. stackoverflow.com/questions/28...
stackoverflow.com
Use pipe operator %>% with replacement functions like colnames()<-
How can I use the pipe operator to pipe into replacement function like colnames()&lt;- ? Here's what I'm trying to do: library(dplyr) averages_df &lt;- group_by(mtcars, cyl) %&gt;% summarise(
1101
Reposted by Alex Coppock
Gwyneth McClendon @gmcclendon.bsky.social · 29/12/2025
Coauthors Liz Sperber, O’Brien Kaaba and I have published 3 papers about youth civic ed and political participation, based on a WhatsApp experiment and a prior in-person pilot conducted in collaboration w/ Caritas Zambia CCMG Zambia @poverty-action.bsky.social and United Council of Churches Zambia
1177
Alex Coppock @aecoppock.bsky.social · 16/12/2025
signal boost!
111