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Drew Dimmery

@ddimmery.com

social science methods: experiments, stats, ML. has read over a dozen books

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02.05.2023
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Latest posts by Drew Dimmery @ddimmery.com

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Who produces hate speech? And how does that matter for content moderation?

We show that across different countries and platforms, a relatively small share of users are responsible for a very large share of hate - overall, 5% write 83-100% of hateful content.

www.cambridge.org/core/journal...

06.03.2026 13:21 πŸ‘ 50 πŸ” 20 πŸ’¬ 1 πŸ“Œ 4
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When you see "AI-generated" on Instagram, does it make you more skeptical – or more trusting of everything without a label?

New research from German Instagram users has answers for policymakers pushing for AI labeling laws.
Good news and a warningπŸ‘‡

25.02.2026 09:01 πŸ‘ 2 πŸ” 3 πŸ’¬ 2 πŸ“Œ 0
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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...

17.02.2026 15:26 πŸ‘ 9 πŸ” 4 πŸ’¬ 2 πŸ“Œ 0
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🚨My first preprint is out on @socarxiv.bsky.social!
How do AI-generated content labels shape what people see as authentic on social media β€” and do labels have unintended side effects? osf.io/preprints/so...

A thread 🧡

12.02.2026 14:06 πŸ‘ 17 πŸ” 7 πŸ’¬ 7 πŸ“Œ 0
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Measuring Causal Impact of Online Actions via Natural Experiments | Proceedings of the 21th ACM SIGKDD International Conference on Knowledge Discovery and Data Mining

I think this is unfair to front door, which I think has actual empirical potential. e.g. dl.acm.org/doi/10.1145/... // amstat.tandfonline.com/doi/abs/10.1... I think one problem is that it's less "design-based" in the sense of requiring more complicated identification stories.

01.01.2026 19:56 πŸ‘ 2 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
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Website Refresh – Drew Dimmery Automating publication updates with Semantic Scholar, setting up email newsletters with Listmonk, and optimizing fonts and performance. Tending my corner of the web, one small improvement at a time.

Next a foray into refreshing and updating the workings of my website and a reflection on why this is Good:
ddimmery.com/posts/websit...

24.11.2025 10:53 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
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Back to Basics – Drew Dimmery Platforms reduce complexity by constraining possibility, but its easier than ever to build one’s own systems. Those who can should forge their own path, paving the way for a more convivial web.

I'm back to blogging on my own pixels. I should remember to actually share posts here.

First, a post laying out why I won't be blogging on Substack:
ddimmery.com/posts/back-t...

24.11.2025 10:53 πŸ‘ 1 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0
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Join us next week for the Brown Bag Seminar!
We’re excited to host Professor @ddimmery.com for a discussion on how to design studies that preemptively address challenges, improving inference and generalization before data collection even begins.

Register πŸ‘‰ www.hertie-school.org/en/datascien...

13.11.2025 13:54 πŸ‘ 3 πŸ” 1 πŸ’¬ 0 πŸ“Œ 2

The Experiments Section Newsletter is BACK! Latest issue just dropped: what do we actually do while conducting experiments, and how do we handle unexpected events?

07.03.2025 21:24 πŸ‘ 6 πŸ” 3 πŸ’¬ 1 πŸ“Œ 0

The end of 538 is a huge shame - both for the incredible people who worked there, and for political and data journalism as a whole.

I was lucky enough to work beside them for a few years and want to say a bit about what I think was so valuable that I hope doesn't vanish from the media landscape: 🧡

06.03.2025 17:19 πŸ‘ 14 πŸ” 3 πŸ’¬ 1 πŸ“Œ 0
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What's the point of RCTs? An ontological perspective

RCTs are good, but not (just) because they make the statistics easy.

13.02.2025 14:29 πŸ‘ 16 πŸ” 3 πŸ’¬ 0 πŸ“Œ 0
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Interested in how people talk to each other online? Care about causal inference and/or NLP? Want to design and implement field experiments?

Come do a PhD with Dominik Hangartner, me, and a bunch of awesome people at IPL in Zurich:
jobs.ethz.ch/job/view/JOP...

07.02.2025 12:47 πŸ‘ 10 πŸ” 9 πŸ’¬ 0 πŸ“Œ 0
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What was US2020? The US 2020 Facebook and Instagram Election Project (US2020) was a sprawling project with dozens of people involved at various levels.

The US2020 project was not independent (and that's good) open.substack.com/pub/drewdimm...

29.01.2025 14:28 πŸ‘ 5 πŸ” 2 πŸ’¬ 0 πŸ“Œ 0
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Is Bluesky convivial? Smalltalk and the impossibility of social toolmaking to empower end-users

I riffed on Ivan Illich, Smalltalk and This Place. open.substack.com/pub/drewdimm...

21.11.2024 18:57 πŸ‘ 5 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
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A thread about being wrong:

5 years ago, we wrote a paper about how how newly enfranchised 16-year-olds vote in Austria. But we were wrong.

This year, @elisabethgraf.bsky.social, @schnizzl.bsky.social, Sylvia Kritzinger and I are setting the record straight: authors.elsevier.com/c/1juT5xRaZk...

21.11.2024 18:00 πŸ‘ 662 πŸ” 163 πŸ’¬ 26 πŸ“Œ 58
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Welcome to Hertie, @ddimmery.com ! 🀝 
The Professor of Data Science for the Common Good begins teaching today.
"Algorithms, code and machine learning are an increasingly large part of how our world works. I'm excited to empower students to understand these topics!"
@hertiedatascience.bsky.social

05.02.2024 12:10 πŸ‘ 11 πŸ” 1 πŸ’¬ 0 πŸ“Œ 0
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Examining the Apparatus The purpose of a system is what it does

Using the reframing of "the Algorithm" to "the Apparatus" should shape how we evaluate what it is/does open.substack.com/pub/drewdimm...

30.01.2024 16:29 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
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Calibration as an HTE diagnostic Paper just accepted to Information Systems Research

Continuing with the controversial takes, in this post I argue that folks should plot their data (based on a new paper at ISR with Yan Leng) open.substack.com/pub/drewdimm...

16.01.2024 16:16 πŸ‘ 3 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0
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Plagiarism is bad Papers are what we do: we should try to do them well

Got a hot take: open.substack.com/pub/drewdimm...

04.01.2024 16:48 πŸ‘ 4 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

Thank you, this is still a nice suggestion!

07.11.2023 10:57 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

Does anyone know of a good intellectual history of ML/AI? Something that doesn't just survey the development of methods, but includes things like "Papert and Minsky think solving computer vision will be an undergrad summer project in the 60s"

06.11.2023 13:20 πŸ‘ 2 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

Your weird linear algebra fact of the day:

b_ols = (X'X)^{-1} X'y = X^+ y

where X^+ is the Moore-Penrose inverse and X'X is invertible.

22.10.2023 19:06 πŸ‘ 4 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
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Accelerationism is Terrorism Accelerating change has become both addictive and intolerable.

Really nice post by Kevin about the (insane) techno-optimist manifesto. There's also an implicit meta-level critique about modes of thinking that's worth considering, too: the Manifesto was basically a tweet-thread; Kevin's post is not. open.substack.com/pub/kevinmun...

17.10.2023 20:41 πŸ‘ 2 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
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Stop looking for the next Twitter BlueSky doesn't solve any of Twitter's real problems, nor will any other microblog

Wrote some thoughts on microblogging (derogatory)

03.10.2023 12:54 πŸ‘ 9 πŸ” 2 πŸ’¬ 0 πŸ“Œ 1
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Let them eat burgers! Austrian chancellor says low-income families should eat at McDonald’s No money for food? Go to McDonald’s, Karl Nehammer says.

Meanwhile, in Austria, US soft power is undefeated

www.politico.eu/article/let-...

29.09.2023 12:07 πŸ‘ 3 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
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A Blueprint for the Regulation of Tech Counterfactuals are the key to accurately assessing the risks of online platforms

My coauthor Drew Dimmery (formerly of Meta) on how the 2020 US Facebook and Instagram Election Project offers a template for reporting by social media platforms under future regulation - recommended

11.09.2023 18:45 πŸ‘ 11 πŸ” 5 πŸ’¬ 0 πŸ“Œ 0
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bwd A clean implementation of the Balancing Walk Design for online experimental design from Arbour, Dimmery, Mai and Rao (2022)

I finally got around to posting a package to PyPi (https://pypi.org/project/bwd/). Geez, the comparison to the CRAN process is like night and day.

Zero worrying about a petty tyrant yelling at me for not following some abstruse and poorly documented procedures.

11.07.2023 15:36 πŸ‘ 5 πŸ” 2 πŸ’¬ 0 πŸ“Œ 0