Sign in

Jeff Ziegler

@jeffreymziegler.bsky.social
1.2K followers 761 following 35 posts

Assistant Professor in Political Science & Data Science at Trinity College Dublin, Director of the Applied Social Data Science (ASDS) Programme. Former Post-Doc at QTM Emory, WUSTL PhD, UW-Madison alum & native. www.jeffreyziegler.org

PostsRepliesMedia
Reposted by Jeff Ziegler
Tobias Rüttenauer @ruettenauer.bsky.social · 8h
Have we abandoned #TWFE too quickly?😮 New in #Sociological #Methodology w/ @aksoyundan.bsky.social We compare TWFE event studies vs dynamic #DID estimators. Results suggest a more nuanced picture than "never use TWFE" and clarify when different estimators perform well 👇 🔗 doi.org/10.1177/0081...
03820
Reposted by Jeff Ziegler
Stephen Wild @stephenjwild.bsky.social · 14/10/2026
A couple more: link.springer.com/book/10.1007...
link.springer.com
Practical Tools for Designing and Weighting Survey Samples
The textbook is created for survey practitioners who design, select, and weight survey samples. This edition notes the important developments in making inferences from non-probability samples, in add...
1142
Reposted by Jeff Ziegler
Todd Jones @toddrjones.bsky.social · 13/10/2026
🚨 Public good alert: I put together a list of 100+ free datasets for social science research, spanning a large number of topics. I hope it's useful for students, researchers, and anyone looking for interesting data to explore. It's on GitHub - contributions welcome! github.com/toddrjones/d...
github.com
GitHub - toddrjones/datasets: A collection of free datasets useful for use in applied microeconomics, data visualization, etc.
A collection of free datasets useful for use in applied microeconomics, data visualization, etc. - toddrjones/datasets
615970
Reposted by Jeff Ziegler
Daniel Lakens @lakens.bsky.social · 11/10/2026
Researchers often can't increase the size of their sample (e.g., due to research constraints). In my paper on sample size justification I discuss approaches to increase power without increasing the sample size (e.g., within designs, reducing variability) lakens.github.io/statistical_...
lakens.github.io
8  Sample Size Justification – Improving Your Statistical Inferences
This open educational resource contains information to improve statistical inferences, design better experiments, and report scientific research more transparently.
15515
Reposted by Jeff Ziegler
Richard McElreath 🐈‍⬛ @rmcelreath.bsky.social · 11/10/2026
We really need to make Meng's Big Data Paradox central to teaching, don't we? Researchers don't know this stuff bc they have never been exposed to it. But it is fundamental. (Link to paper PDF statistics.fas.harvard.edu/sites/g/file...)
3. Compensating for quality with quantity is a doomed game.
3.1. A law of large populations? Under a probabilistic sampling, a central
driving force for the stochastic behaviors of the sample mean (and alike) is the
sample size n. This is the case for the Law of Large Numbers (LLN) and for the
Central Limit Theorem (CLT), two pillars of theoretical statistics, and of much of
applied statistics because we rely on LLN and CLT to build intuitions, heuristic
arguments, or even models. However, identity (2.3) implies that once we lose control of probabilistic sampling, then the driving force behind the estimation error is
no longer the sample size n, but rather the population size N. Specifically, (2.3)
and (2.5) together imply that
(3.1) Zn,N ≡ Gn − GN

VSRS(Gn)
= ρR,G1−f
f σG
1−f
n S2
G
= √
N − 1ρR,G.
418246
Reposted by Jeff Ziegler
Cambridge University Press Political Science & IR @cambup-polsci.cambridge.org · 12/10/2026
#OpenAccess from @jepsjournal.bsky.social - Covariate Adjustment in Political Science Experiments: Progress and Recommendations - cup.org/4B2hTUw - Matthew H. Graham & Binh Hoang #FirstView
Logo of the Journal of Experimental Political Science (JEPS) with the hashtag #OpenAccess, displayed in white text on a dark blue background.
094
Reposted by Jeff Ziegler
Political Science Research and Methods @psrm.bsky.social · 29/09/2026
⛪️ Does a politician's religiosity influence their policymaking? ➡️ Luca Vitale finds that narrowly elected religious Catholic mayors in Italy increase debt repayment, showing how religious values can shape politicians' fiscal decisions doi.org/10.1017/psrm...
074
Reposted by Jeff Ziegler
Drew Engelhardt @amengel.bsky.social · 14/09/2026
"In the past month, 41% of voters reported getting political information from AI search summaries and 17% said they had used a chatbot to get information about politics or elections." Important datapoint. But notes chatbots also one piece in a mix of sources. caucusai.substack.com/p/new-survey...
caucusai.substack.com
New survey data: who’s using which chatbots and how they’re (not yet) a primary source of political information for voters
As we head into the final stretch of the 2026 midterms, what role is AI actually playing in how voters are making up their minds?
263
Reposted by Jeff Ziegler
Christina Gahn @christinagahn.bsky.social · 09/09/2026
Presenting at #ECPRGC26 in Kraków tomorrow! Where do parties hang their campaign posters? @klingelt.bsky.social and I walked every street of Friedrichshain-Kreuzberg during the 2025 Bundestag election and collected 6,800+ photos, 10,000+ posters. THU 9:00–10:45, Room 08 @ecpr.bsky.social
25412
Reposted by Jeff Ziegler
Per Engzell @pengzell.bsky.social · 03/09/2026
Several interesting job openings now at the European Commission Joint Research Centre in Ispra, Italy, including two Quantitative Policy Analysts: one in survey data and one in impact evaluation. recruitment.jrc.ec.europa.eu/vacancies
01613
Reposted by Jeff Ziegler
Grant McDermott @gmcd.bsky.social · 03/07/2026
𝐭𝐢𝐧𝐲𝐩𝐥𝐨𝐭 v0.7.0 now available on CRAN 🎉 This is big release, with loads of new features. Same tiny footprint, though ;-) Short highlight thread below, borrowing examples from our gallery: grantmcdermott.com/tinyplot/vig...
https://github.com/grantmcdermott/tinyplot/blob/main/vignettes/gallery_figs/bubble-quakes.Rhttps://github.com/grantmcdermott/tinyplot/blob/main/vignettes/gallery_figs/simpsons-paradox.Rhttps://github.com/grantmcdermott/tinyplot/blob/main/vignettes/gallery_figs/barplot-meat.Rhttps://github.com/grantmcdermott/tinyplot/blob/main/vignettes/gallery_figs/spineplot-titanic.R
48726
Reposted by Jeff Ziegler
Rachel Porter @rachelporter.bsky.social · 15/06/2026
“Just collect more data” is one of the most common responses to uncertainty in quantitative research. But in a lot of social science, that advice is impossible—or even misleading. Our new working paper asks: when has a study reached its information limit? Check it out here: osf.io/preprints/so...
38821
Reposted by Jeff Ziegler
Anton Strezhnev @astrezh.bsky.social · 14/04/2026
@yiqingxu.bsky.social, Jens Hainmueller and Avi Acharya have a cool paper to get political scientists to just fit structural choice models to their choice survey experiments! yiqingxu.org/papers/2026_...
1249
Reposted by Jeff Ziegler
Stephen Turner @stephenturner.us · 23/03/2026
A One-Page Primer on: Statistical Power from @carlislerainey.bsky.social www.carlislerainey.com/blog/2025-08...
1179
Reposted by Jeff Ziegler
Per Engzell @pengzell.bsky.social · 19/03/2026
Ok now this paper looks amazing. By @jbenmenachem.com and coauthors, forthcoming in Sociological Methods and Research.
"Rethinking Repeatability in Observational Social Science" by Jonathan Ben-Menachem, Ari Galper, and Nic Fishman. 

Abstract: Sociology has remained relatively insulated from debates about the ‘replication crisis.’ Heeding calls to consider replication more deeply, we introduce a distinction between two types of research reforms that have emerged in the wake of the crisis: specification-restricting reforms and specification-expanding reforms. Specification-restricting reforms—the more popular of the two—aim to increase the repeatability of research findings by controlling false positives. We show how these reforms’ internal logic breaks down outside of randomized experiments; in observational contexts, they risk enshrining fragile or misspecified models. We further argue that the premise of these reforms is flawed. Replication rates cannot be reduced to the purported prevalence of false positive findings. In their place, we propose a replication framework cen- tered on specification-expanding reforms, stronger incentives for confirmatory research, and meta-analysis. This approach equips sociology to assess the repeatability of findings and build a more cumulative discipline.
19831
Reposted by Jeff Ziegler
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 Jeff Ziegler
Drew Engelhardt @amengel.bsky.social · 25/02/2026
New w/@scottclifford.bsky.social. Lots of work uses agree-disagree scales, and a lit review shows these are 1) frequently just measured in one direction (agree = higher trait) and 2) correlated with each other. This has potentially big issues for conclusions. link.springer.com/article/10.1...
link.springer.com
Acquiescence Bias and Criterion Validity: Problems and Potential Solutions for Agree-Disagree Scales - Political Behavior
Political Behavior - Scholars frequently measure dispositions like populism, conspiracism, racism, and sexism by asking survey respondents whether they agree or disagree with statements...
411249
Reposted by Jeff Ziegler
Dirk Hovy @dirkhovy.bsky.social · 20/01/2026
🚨(Software) Update: In my PhD, I had a side project to fix an annoying problem: when you ask 5 people to label the same thing, you often get different answers. But in ML (and lots of other analyses), you still need a single aggregated answer. Using the majority vote is easy–but often wrong. 1/N
github.com
GitHub - dirkhovy/MACE: Multi-Annotator Competence Estimation tool
Multi-Annotator Competence Estimation tool. Contribute to dirkhovy/MACE development by creating an account on GitHub.
67614
Reposted by Jeff Ziegler
G Elliott Morris @gelliottmorris.com · 14/01/2026
I built this for fun. Not really sure what to do with it. Maybe it will be useful to people trying to understand polling. Might even be a decent teaching example. (Feedback welcome. I am not a web designer, please be kind.) poll-simulator.netlify.app
poll-simulator.netlify.app
Polling Simulator - How do polls work?
Explore how random error and methodological choices shape the results of political polls.
1011417
Reposted by Jeff Ziegler
Adam Kucharski @adamjkucharski.bsky.social · 13/01/2026
Want to get the data out of a PDF figure? As in, the actual data – not a rough trace-along-the-lines version? I made an app you might like: adamkucharski.github.io/pdf2plot/ It all started a few years ago... 🧵
18479182
Reposted by Jeff Ziegler
Kevin Collins @kwcollins.bsky.social · 09/01/2026
Very interesting new study using CES data from Scott Platte and @bfschaffner.bsky.social new in @psrm.bsky.social www.cambridge.org/core/journal...
11210
Reposted by Jeff Ziegler
Yamil Ricardo Velez @yamilrvelez.bsky.social · 24/11/2025
As @seanjwestwood.bsky.social's terrifying new PNAS article demonstrates, LLMs can now pass almost every attention check, mirror personas, stay consistent across pages, and systematically bias responses in the aggregate. So here’s a different angle: verify physical presence, not text.
1539
Reposted by Jeff Ziegler
Jessica Hullman @jessicahullman.bsky.social · 18/12/2025
Many think LLM-simulated participants can transform behavioral science. But there's been a lack of accessible discussion of what it means to validate LLMs for behavioral scientists. Under what conditions can we trust LLMs to learn about human parameters? Our paper maps the validation landscape. 1/
210327
Reposted by Jeff Ziegler
John Holbein @johnholbein1.bsky.social · 18/12/2025
Cool new tool to check if your references contain retraction risks. www.retractionrisk.com
02010
Reposted by Jeff Ziegler
Sarah Brierley @sarahbrierley.bsky.social · 17/12/2025
I am hiring a post-doctoral fellow (2 years) to work on all things political finance in Africa. There are no teaching obligations, and lots of opportunities for fieldwork. A PhD in Political Science is a requirement. Please spread the word! Happy to answer questions - send them to my LSE email.
03034
Reposted by Jeff Ziegler
Saloni @scientificdiscovery.dev · 09/12/2025
Big new blogpost! My guide to data visualization, which includes a very long table of contents, tons of charts, and more. --> Why data visualization matters and how to make charts more effective, clear, transparent, and sometimes, beautiful. www.scientificdiscovery.dev/p/salonis-gu...
screenshot of my post
28802312
Reposted by Jeff Ziegler
Matt Graham @mattgraham.bsky.social · 04/12/2025
Survey experiments' popularity in political science is getting attention. What is good and bad about them? How can one maximize their benefits and mitigate their downsides? Greg Huber and I wrote up our thoughts: Paywalled: doi.org/10.1016/bs.h... Free: m-graham.com/papers/Huber...
19625
Jeff Ziegler @jeffreymziegler.bsky.social · 03/12/2025
Lots of concern about ⬆️ of survey experiments as signal of “credible causal evidence”, but I’m genuinely curious: what’s the alternative if we study trends that happen rarely, are hard to measure, or lack data? Causality aside, seems like surveys and/or experiments are an incredibly useful tool?
1132
Reposted by Jeff Ziegler
John Holbein @johnholbein1.bsky.social · 02/12/2025
"The Credibility Revolution in Political Science" osf.io/preprints/so...
53414
Reposted by Jeff Ziegler
Ingo Rohlfing @ingorohlfing.bsky.social · 02/12/2025
Readable, Reliable, Reusable: A Guide to Clean #rstats Code jacciz.github.io/portfolio/pr... Lots of good advice in this post. Too bad one (better, I) keeps forgetting about some practices in the process and follow bad practices
0103
Reposted by Jeff Ziegler
apoorva lal @handle.invalid · 26/11/2025
handy little data hoarder tool i built and deployed for myself but others might find useful lalten.org/linkpull/ 1) academic or govt site with a bunch of hyperlinks 2) write a regex to grab all links matching a pattern in said url, copy and paste into file 3) download with wget or curl
161
Reposted by Jeff Ziegler
Matt Martin @mattjmartin.com · 20/11/2025
The new Comparative Constitutions Project website is now live! Developed by yours truly. We're also releasing version 5.0 of our Constitutional Chronology and Constitutional Characteristics datasets, updated through 2023. Explore and download: comparativeconstitutionsproject.org
comparativeconstitutionsproject.org
Comparative Constitutions Project
Producing data about constitutions. Impacting the constitution-making process. Promoting peace, justice, and human development.
2166
Reposted by Jeff Ziegler
Stefan Müller @stefanmueller.bsky.social · 20/11/2025
UCD Graduate Studies and I have produced a Research Group Handbook template for supervisors and researchers. The template outlines core topics, resources, and policies that groups can adapt to their needs. ➡️ Template and details: www.ucd.ie/graduatestud... @ucddublin.bsky.social 1/2
Title page of Research Group HandbookPoster on building community through a reserach group handbook, presented at the 2025 All-Island Research Culture Network Conference in Belfast.
2307
Jeff Ziegler @jeffreymziegler.bsky.social · 14/11/2025
⏰ ⏰ Final call! Submit your abstract for PolMeth - Europe 2026 by Nov 15th here: polmeth.eu. Don’t miss the chance to share your research and connect with other world-class scholars ☺️
polmeth.eu
PolMeth Europe 2026
Conference website for European PolMeth meeting on 7-8 May 2026, hosted by TCD.
051
Reposted by Jeff Ziegler
Hadley Wickham @hadley.nz · 13/11/2025
testthat 3.3.0 out now! This is a massive release with tons of improvements including better failure messages, new expectations, improved snapshotting, new vignettes, and much much more: tidyverse.org/blog/2025/11... Post includes some thoughts on developing an #rstats package with Claude Code.
tidyverse.org
testthat 3.3.0
testthat 3.3.0 brings improved expectations with better error messages, new expectations for common testing patterns, and lifecycle changes including the removal of `local_mock()` and `with_mock()`. I...
19115
Jeff Ziegler @jeffreymziegler.bsky.social · 12/11/2025
Conference deadlines have habit of sneaking up. This is your friendly reminder that the call for applications is still open for PolMeth - Europe. Don’t let yourself suffer from FOMO, and come to Dublin this coming May!
010
Reposted by Jeff Ziegler
LSE Methodology @lsemethodology.bsky.social · 10/11/2025
🌎New @lseimpactblog.bsky.social: Nano-targeting or mass appeal, what makes persuasive climate communications? Thomas Robinson, @miriamsorace.bsky.social @simonhix.bsky.social & @fresejoris.bsky.social explore how new tools make targeting individuals at scale with tailored communications possible 👉
blogs.lse.ac.uk
Nano-targeting or mass appeal, what makes persuasive climate communications? - Impact of Social Sciences
Are nano-targeting tools capable of creating more persuasive climate communications, or broad appeal messages still the best way to move audiences on climate?
064
Reposted by Jeff Ziegler
Public Opinion Analytics Lab (POAL) @poalab.bsky.social · 10/11/2025
"While testing one dimension at a time can yield simple results, those effects may not generalise to richer, real-world contexts." Read our new POAL Methods Briefs on Conjoint Experiments from Thomas Robinson! Link: www.poal.co.uk/research/met...
poal.co.uk
Public Opinion Analytics Lab
The website of the Public Opinion Analytics Lab
01210
Jeff Ziegler @jeffreymziegler.bsky.social · 04/11/2025
A little less than 2 weeks to submit an abstract proposal for PolMeth - Europe. Join us in Dublin this coming May to share your new political science research using cutting edge methods!!
032
Jeff Ziegler @jeffreymziegler.bsky.social · 02/11/2025
I cannot stress this enough to my own students, you cannot outsource your own learning!!
061
Jeff Ziegler @jeffreymziegler.bsky.social · 30/10/2025
Might need to look into this!
000
Jeff Ziegler @jeffreymziegler.bsky.social · 30/10/2025
Super interesting, wasn’t aware of other elections that put up candidate posters like this during campaigns! I’ve got an ongoing project collecting candidate posters and locations in Ireland, do you know if there’s a similar effort in Denmark?
120
Reposted by Jeff Ziegler
Darren Dahly @statsepi.bsky.social · 28/10/2025
My own TLDR for the message from this paper: statsepi.substack.com/p/sorry-what...
You aren't allowed to say “risk factor”

People often say their goal is to identify “risk factors”. But what does that mean? Some people use the term to indicate potential causes of outcomes. Then just say cause. Others use it to identify predictors of outcomes. Then just say predict. And, sadly, too many others use it as shorthand for factors that are “statistically associated” with outcomes. In this case, say nothing at all, since this “goal” has no clinical utility whatsoever (beyond what it might suggest about causation or prediction). So once you have framed your research question as description, prediction, causation or measurement, there is no longer a need to talk about risk factors. It's basically just a catch-all phrase to cover up muddy thinking.
57221
Jeff Ziegler @jeffreymziegler.bsky.social · 22/10/2025
Submit, submit! 🚨 Pleasant reminder to all, the 5th European PolMeth meeting will be 14-15 May 2026 at Trinity College Dublin 🇮🇪 Submissions close Nov. 15 ⚠️ You can find out more about the conference, including the submission form, here: polmeth.eu If you have any questions, please contact me 😀
098
Reposted by Jeff Ziegler
LSE Methodology @lsemethodology.bsky.social · 09/10/2025
Not long left to apply for our Assistant Professor in Computational Social Science vacancy❗ 📚 jobs.lse.ac.uk/Vacancies/W/... Apply before 26 October and join an internationally outstanding group of social science methodologists 🌎
we're hiring assistant professor in computational social science, applications close 26/10/2025
066
Reposted by Jeff Ziegler
Catherine E. de Vries @catherinedevries.bsky.social · 14/10/2025
Every academic career is built on rejection, but we don’t show it. 
CVs list publications, grants & awards, not rejected manuscripts, unfunded proposals, or failures. 
But those invisible rejections shape us more than our successes ever do. 👉 catherineeunicedevries.substack.com/p/fail-bette... 🧵
catherineeunicedevries.substack.com
Fail Better: Why Your Rejections Will Shape You More Than Your Publications
The Art of Learning from Rejection
821876
Reposted by Jeff Ziegler
British Journal of Political Science @bjpols.bsky.social · 13/10/2025
#OpenAccess from August 2025 - Not Getting the Message on Climate? Attention as a Key Barrier to Mass-Marketing Experimentally-Validated Messages - cup.org/3HgDIJ9 - Nicholas Carnes & Geoffrey L. Henderson #ClimateChange
BJPolS abstract discussing the challenges and strategies of survey-based political messaging, focusing on direct mail campaigns and their impact on public attitude towards climate change.
064
Reposted by Jeff Ziegler
Fabio Votta📊🐧 @favstats.eu · 11/10/2025
🚀 And this marks our launch of the CampAIgn Tracker 🇳🇱! @meinungsfuehrer.bsky.social and I are glad to finally publish our dashboard where we monitor the use of AI imagery in campaign messages, by parties, politicians & other actors during the election #tk2025 See here www.campaigntracker.nl/en/
05022