Rohan Alexander

This Wednesday, 4 March 2026, 10am (EST) on Zoom - utoronto.zoom.us/j/4784708970 - Toronto Data Workshop hosts Lisa Oswald, Goethe University in Frankfurt am Main, on “Disentangling participation in online political discussions with a collective field experiment”. All welcome.

Photo of a 1.36kg Diamond Crystal Kosher Salt box “Foodservice use only. Not for retail sale”!

Men only want one thing.

Two recent pre-prints:
1) "Same Prompt, Different Outcomes: Evaluating the Reproducibility of Data Analysis by LLMs" with Jiaxin (Allyson) Cui, arxiv.org/abs/2602.14349
2) "Benchmarking AI Performance on End-to-End Data Science Projects" with Evelyn Hughes, arxiv.org/abs/2602.14284
Comments welcome.

Congratulations. Wonderful to see this released!

🧵on my new paper "Synthetic personas distort the structure of human belief systems" w Roberto Cerina I'm v excited about...

🚨 Do synthetic samples look like human samples?

We compare 28 LLMs to the 2024 General Social Survey (GSS) to find out + develop host of diagnostics...

That's wonderful! Congratulations mate.

Very interesting "Academic publishing in LLM age": osf.io/9sxnc/files/...

This was interesting. Thanks for posted this; I didn't know about the paper. Without wanting to impose, you might be somewhat interested in my own similar work on related topics, preprints: arxiv.org/abs/2602.14284 and arxiv.org/abs/2602.14349.

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.

🎺 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!

This was really interesting.. Thanks for posting it.

Is online discourse getting worse?

To bring actual data to bear on this question, we launched the Public Discourse Indicator, a dashboard tracking online comments submitted to several major Swiss newspapers. Our aim here is twofold:
www.public-discourse.org/en/public-di...

Super interesting. Thanks for sharing the project.

Two recent pre-prints:
1) "Same Prompt, Different Outcomes: Evaluating the Reproducibility of Data Analysis by LLMs" with Jiaxin (Allyson) Cui, arxiv.org/abs/2602.14349
2) "Benchmarking AI Performance on End-to-End Data Science Projects" with Evelyn Hughes, arxiv.org/abs/2602.14284
Comments welcome.

Wow incredible! Congratulations !

Nice paper! Thanks for sharing!

Monica's latest! read.dukeupress.edu/demography/a...

That story was incredible. What a kid.

Big congratulations to Rohan Alexander & Tim Hatton for their article ‘The making of a nation: Who voted for Australian federation?' which has won the 2025 Sir Timothy Coghlan award for best paper in the Asia-Pacific Economic History Review!

I'm so sorry to hear about this Emily :(

TFW you accidentally agreed to take your 4yo to Italy tonight, thinking he wouldn't remember, and he very much remembers.

It's brutal when that happens.

I think ISLR uses base.

Always has been meme. “Wait, domain knowledge is the most valuable thing a data scientist can have?”

The better LLMs get, the more data scientists are going to find out the truth.

Calling folks working in a #DataScience (or related) role 📣 – we want you to fill out our survey aiming to understand if and how practicing data scientists use and integrate #LLMs 🤖 into their data science tasks.

www.linkedin.com/posts/tiffan...

4yo: I'm running away.
Me: Okay. Where are you going?
4yo: Ottawa.
*Speechless*

Poster showing speakers for the TPN seminar series

The Toronto Population Network @tpn-uoft.bsky.social Seminar Series is happening this semester, with a great line-up, including @lucampesando.bsky.social, Orsola Torrisi, @mdhayward.bsky.social, and @jnobles.bsky.social! Starts next Tuesday. If you're in Toronto please come along!

That combination is unmatched.

Sensible and thoughtful (and correct) as always.

Wow this is so interesting. Thanks for posting!