Jeff Ziegler
@jeffreymziegler.bsky.social
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
Former Post-Doc at QTM Emory, WUSTL PhD. UW-Madison alum & native.
www.jeffreyziegler.org
Pinned
Jeff Ziegler
@jeffreymziegler.bsky.social
· Oct 22
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 😀
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 😀
Reposted by Jeff Ziegler
🚨(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
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 - dirkhovy/MACE: Multi-Annotator Competence Estimation tool
Multi-Annotator Competence Estimation tool. Contribute to dirkhovy/MACE development by creating an account on GitHub.
github.com
January 20, 2026 at 10:12 AM
🚨(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
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
Reposted by Jeff Ziegler
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.
poll-simulator.netlify.app
January 14, 2026 at 3:01 PM
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
Reposted by Jeff Ziegler
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... 🧵
I made an app you might like: adamkucharski.github.io/pdf2plot/
It all started a few years ago... 🧵
January 13, 2026 at 9:12 PM
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... 🧵
I made an app you might like: adamkucharski.github.io/pdf2plot/
It all started a few years ago... 🧵
Reposted by Jeff Ziegler
Very interesting new study using CES data from Scott Platte and @bfschaffner.bsky.social new in @psrm.bsky.social
www.cambridge.org/core/journal...
www.cambridge.org/core/journal...
January 9, 2026 at 2:18 PM
Very interesting new study using CES data from Scott Platte and @bfschaffner.bsky.social new in @psrm.bsky.social
www.cambridge.org/core/journal...
www.cambridge.org/core/journal...
Reposted by Jeff Ziegler
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.
So here’s a different angle: verify physical presence, not text.
November 24, 2025 at 2:57 PM
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.
So here’s a different angle: verify physical presence, not text.
Reposted by Jeff Ziegler
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/
1/
December 18, 2025 at 5:53 PM
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/
1/
Reposted by Jeff Ziegler
December 18, 2025 at 9:40 PM
Reposted by Jeff Ziegler
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.
🚨We're #hiring!
We're looking for a #Research #Fellow to join our team. The successful candidate will be part of the research project "Political #Finance in #Africa" led by Associate Professor @sarahbrierley.bsky.social for 2 years.
🗓️Apply by Monday 12 January 👇🏽
jobs.lse.ac.uk/Vacancies/W/...
We're looking for a #Research #Fellow to join our team. The successful candidate will be part of the research project "Political #Finance in #Africa" led by Associate Professor @sarahbrierley.bsky.social for 2 years.
🗓️Apply by Monday 12 January 👇🏽
jobs.lse.ac.uk/Vacancies/W/...
Research Fellow (Political Finance in Africa (POLFINA))
Research Fellow (Political Finance in Africa (POLFINA)),
,
<p style="background: white; margin: 0cm; text-align: center;"><em><span style="color: #333333;">LSE is committed to building a diverse, equi...
jobs.lse.ac.uk
December 17, 2025 at 11:58 AM
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.
Reposted by Jeff Ziegler
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...
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...
December 9, 2025 at 8:28 PM
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...
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...
Reposted by Jeff Ziegler
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...
Greg Huber and I wrote up our thoughts:
Paywalled: doi.org/10.1016/bs.h...
Free: m-graham.com/papers/Huber...
December 4, 2025 at 1:54 PM
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...
Greg Huber and I wrote up our thoughts:
Paywalled: doi.org/10.1016/bs.h...
Free: m-graham.com/papers/Huber...
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?
New paper! @william-dinneen.bsky.social @guygrossman.bsky.social Yiqing Xu and I use GPT to code 91k articles from 174 polisci journals (2003–2023)and track research designs, transparency practices, and citations. How has the credibility revolution reshaped the discipline? doi.org/10.31235/osf...
🧵
🧵
December 3, 2025 at 10:58 AM
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?
Reposted by Jeff Ziegler
December 2, 2025 at 7:09 PM
Reposted by Jeff Ziegler
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
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
December 2, 2025 at 2:49 PM
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
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
Reposted by Jeff Ziegler
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
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
November 26, 2025 at 6:19 AM
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
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
Reposted by Jeff Ziegler
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
Comparative Constitutions Project
Producing data about constitutions. Impacting the constitution-making process. Promoting peace, justice, and human development.
comparativeconstitutionsproject.org
November 20, 2025 at 4:34 PM
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
Reposted by Jeff Ziegler
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
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
November 20, 2025 at 8:16 AM
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
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
⏰ ⏰ 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 ☺️
Don’t miss the chance to share your research and connect with other world-class scholars ☺️
November 14, 2025 at 10:49 AM
⏰ ⏰ 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 ☺️
Don’t miss the chance to share your research and connect with other world-class scholars ☺️
Reposted by Jeff Ziegler
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.
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...
tidyverse.org
November 13, 2025 at 5:24 PM
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.
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!
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 😀
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 😀
November 12, 2025 at 1:27 PM
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!
Reposted by Jeff Ziegler
🌎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
👉
Thomas Robinson, @miriamsorace.bsky.social @simonhix.bsky.social & @fresejoris.bsky.social explore how new tools make targeting individuals at scale with tailored communications possible
👉
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?
blogs.lse.ac.uk
November 10, 2025 at 11:20 AM
🌎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
👉
Thomas Robinson, @miriamsorace.bsky.social @simonhix.bsky.social & @fresejoris.bsky.social explore how new tools make targeting individuals at scale with tailored communications possible
👉
Reposted by Jeff Ziegler
"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...
Read our new POAL Methods Briefs on Conjoint Experiments from Thomas Robinson!
Link: www.poal.co.uk/research/met...
Public Opinion Analytics Lab
The website of the Public Opinion Analytics Lab
www.poal.co.uk
November 10, 2025 at 8:47 AM
"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...
Read our new POAL Methods Briefs on Conjoint Experiments from Thomas Robinson!
Link: www.poal.co.uk/research/met...
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!!
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 😀
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 😀
November 4, 2025 at 11:49 AM
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!!
I cannot stress this enough to my own students, you cannot outsource your own learning!!
Wrote up a little intervention post/explanation for my class about why using LLMs for trying to learn programming (as first time learners!) is bad and detrimental datavizf25.classes.andrewheiss.com/news/2025-11...
November 2, 2025 at 11:25 PM
I cannot stress this enough to my own students, you cannot outsource your own learning!!
Reposted by Jeff Ziegler
October 28, 2025 at 11:34 AM
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 😀
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 😀
October 22, 2025 at 12:24 PM
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 😀
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 😀