Reposted by Donald SzlosekNoah Greifer @noahgreifer.bsky.social · 17/09/2026Let's say I have a discrete 1-5 scale, and I want to model it with ordinal regression. Normally, this would involve estimating 4 threshold parameters. Let's say no one selects option 2. Should I retain the empty category and estimate its upper threshold? Or collapse to 4 levels w/ 3 thresholds? 552
Reposted by Donald SzlosekPeter Tennant @pwgtennant.bsky.social · 16/09/2026Curious aside: I drafted this letter in a cafe and on a train. On both occasions, the person sat next to me ended up talking to me about the content. They admitted reading the letter (over my shoulder!) and were surprised that scientists were using LLMs given the tendency for slop & hallucination. 1206
Donald Szlosek @dszlosek.bsky.social · 15/09/2026I imagine bot crawling, especially in the LLM world we live in now is going to further cause issues for open science 010
Reposted by Donald SzlosekIván Díaz @idiaz.bsky.social · 10/09/2026(1/22) Over the last few days I have been discussing the role of formal causal inference in RCTs, and in general the role of formalism and rigor in statistics in twitter with @f2harrell.bsky.social. Thread with an example for why both are fundamental for biomedical research: 3135
Reposted by Donald SzlosekThomas Lecaque @tlecaque.bsky.social · 25/08/2026I started my PhD program with an eight week old at home, sole income being my doctoral stipend, in a history program, in Knoxville, TN. And every month we got a new book to read to my son, free, mailed to us, so my kid, my kids, grew up in rooms full of books even when I had no money. That's Dolly. 73183132649
Donald Szlosek @dszlosek.bsky.social · 20/08/2026A huge thank you to @msftresearch.bsky.social for hosting us, and to everyone who showed up for the BostonR User Group at the Microsoft Research & Development Center! 🙌 It was a fantastic evening of learning, discussion, and connecting with others! #rstats #tmle #machinelearning 030
Reposted by Donald SzlosekDamie Pak @damiepak.bsky.social · 16/08/2026Boston useR group lightning talks is brat #rstats, #statistics, #Boston. 083
Reposted by Donald SzlosekJohns Hopkins Dept of Biostatistics @jhubiostat.bsky.social · 21/07/2026We ae hiring an Assistant Professor: apply.interfolio.com/189113 We welcome candidates across the full breadth of biostatistics, including those whose work is grounded in classical & foundational biostatistical theory and methods, as well as those working in data science, machine learning, and AI. 021
Donald Szlosek @dszlosek.bsky.social · 05/08/2026Such an amazing conference! Glad I got the opportunity to present a poster and meet such wonderful people! Blows my mind they accomplished this whole event starting March! #mlsky #datascience 020
Donald Szlosek @dszlosek.bsky.social · 31/07/2026Ecstatic to be partnering with @posit.co and @microsft.bsky.social for our upcoming Boston R User Group Event! Lightning Talks Welcome!! RSVP: tinyurl.com/bostonRaug26 #rstats #statistics #datascience #Bostontinyurl.comLightning Talks & Data Social Hour @ Microsoft, Wed, Aug 19, 2026, 5:00 PM | Meetup**Lightning Talk & Data Social Hour @ Microsoft** We’re excited to bring the Greater Boston useR Group together for another in-person meetup! Join us at the **Microsoft N 1143
Donald Szlosek @dszlosek.bsky.social · 31/07/2026Saddened to hear of Lex Jansen’s passing. There was a time when much of what I knew about statistical programming came from lexjansen.com. Although I’ve since moved away from #SAS, his commitment to openness and knowledge sharing left a lasting impact on our community. He will be deeply missed. 010
Donald Szlosek @dszlosek.bsky.social · 30/07/2026Excited to be joining my first JSM conference AND presenting at the STAI-X conference! Don't be a stranger and feel free to connect to grab some coffee! #rstats #statistics #jsm2026 040
Donald Szlosek @dszlosek.bsky.social · 24/07/2026Lovely Set of #rstats color pallets: ltc-color-palettes 1262
Donald Szlosek @dszlosek.bsky.social · 15/07/2026I had the fortunate event of seeing this talk at @jhubb1995.bsky.social and cannot recommend it enough! AND it is hybrid! 041
Reposted by Donald SzlosekPeter Tennant @pwgtennant.bsky.social · 13/07/2026TIME CHANGE! My farewell lecture on whether DAGs have fulfilled their promise has been moved to 1pm Eastern Time (6pm UK time) on Wednesday 15th July so it does not clash with England vs Argentina! I hope you can all still attend! 5246
Donald Szlosek @dszlosek.bsky.social · 15/07/2026So Thankful for the MASSIVE turn out at our second event for the Greater Boston R User Group meeting! Outstanding Conversations from econometrics, to health equity / policy, to clinical trials and causal inference #rstats 0123
Reposted by Donald SzlosekDemetri @phdemetri.bsky.social · 14/07/2026Man, I should put "numbers" in quotations more often. That hurts like a knife in the chest 082
Donald Szlosek @dszlosek.bsky.social · 13/07/2026Looking forward to co-hosting the next Greater Boston useR Group meetup! Come join us! #Boston #rstats 000
Donald Szlosek @dszlosek.bsky.social · 10/07/2026Is Repeated Bayesian Interim Analysis Consequence-Free? See this excellent conversation that has taken place over the past year at #datamethods tinyurl.com/fhdatamethods #StatsSky #Statistics #ClinicalTrials 020
Reposted by Donald SzlosekDemetri @phdemetri.bsky.social · 03/07/2026Who has a paper on why mediation analysis is bullshit / a legit thing we should do? 3102
Reposted by Donald SzlosekLukasz Olejnik @lukaszolejnik.bsky.social · 14/04/2026Physicist has written a fascinating big beautiful paper.Let’s not be afraid to call it what it is - groundbreaking. arxiv.org/abs/2603.21852 1837882
Reposted by Donald SzlosekBill R aka N1VUX @bill-n1vux.bsky.social · 29/06/2026@chrisstaecker.bsky.social Apropos of today's ⚽️🏟🏆 match, I'm trying to make a trigonometry joke for the sequence Wirtz, Havertz, Haversine, Sine but I'm just going around in unit circles 011
Reposted by Donald SzlosekClimate.us @climate.us · 26/06/2026We got a big bump in traffic yesterday when people learned about us on NPR. Thank you to @npr.org for covering our launch and bringing our story to people's attention! And thank you to all our new followers. We can do this together! 🌍️🧪💪 #ClimateAction #ClimateForUs #ProtectScience 222462898
Donald Szlosek @dszlosek.bsky.social · 02/07/2026A thought came across my head today. I wonder if there would be appetite for scheduled debates on Bluesky around specific topics related to causal inference / AI / TMLE/ stats where where some experts offer to comment / reply for a limited amount of time #askacadmia #episkty #statssky 020
Donald Szlosek @dszlosek.bsky.social · 02/07/2026Can't help but repost Gelman when he talks about Maine! 🫎 🦞 🫐 010
Reposted by Donald SzlosekDarren Dahly @statsepi.bsky.social · 02/07/2026This paper is worth it for table 1 alone. 👏 @sabinehoffmann11.bsky.social @boulesteixlaure.bsky.social et al onlinelibrary.wiley.com/doi/10.1002/...onlinelibrary.wiley.comWhen to Adjust for Multiple Testing: A Unifying Guiding PrincipleMost original articles published in the medical literature report the results of multiple statistical tests. In a few simple cases, there is agreement on whether to adjust for the number of performed... 58428
Reposted by Donald SzlosekFrank Harrell @f2harrell.bsky.social · 02/07/2026Excellent discussion Julia. @stephensenn.bsky.social would have a field day with this paper. 192
Reposted by Donald SzlosekJulia M. Rohrer @dingdingpeng.the100.ci · 02/07/2026Had to read this one to figure out whether it's as click-bait-y as the title. As somebody who has written a lot about causal inference with observational data, I'm quite conflicted about it.> asteriskmag.substack.com/p/the-case-a...asteriskmag.substack.comThe case against randomized controlled trialsEveryone knows RCTs are the gold standard of evidence...right? 610424
Donald Szlosek @dszlosek.bsky.social · 01/07/2026Twin Piques is an absolutely diabolical name for this article by @stephensenn.bsky.social on the limitations/skepticism surrounding digital twins www.linkedin.com/pulse/twin-p...linkedin.comTwin Piques.. 000
Reposted by Donald SzlosekFrank Harrell @f2harrell.bsky.social · 28/06/2026Excellent new blog article by Steve Ruberg: analytixthinking.blog/2026/06/28/b... #Statistics #rct #pharma #clinicaltrial #StatsSkyanalytixthinking.blogNo. 24: Estimands Part 1 – Just Do ITT?Randomization and complete data on the randomized experimental units are needed for cause-and-effect inference. What happens when that logic is broken? 1101
Reposted by Donald SzlosekFrank Harrell @f2harrell.bsky.social · 23/06/2026#Statistics thought of the day: At the heart of much nonsense research lies data analysis (including machine learning) of a complexity that the effective sample size cannot support: hbiostat.org/hdata #StatsSkyhbiostat.orgChallenges of High-Dimensional Data Analysis 1236
Donald Szlosek @dszlosek.bsky.social · 19/06/2026@kdoudrick.bsky.social What a wild ride to read: #academicsky @elsevierconnect.bsky.social 131
Reposted by Donald SzlosekDr. Sandra Steingraber 🏳️🌈 @ssteingraber1.bsky.social · 14/06/2026Your reminder that fairy tales are full of stepmothers because women once routinely died in childbirth, from postpartum sepsis, or from other infectious diseases and left behind housefuls of motherless children. Stable nuclear families are made possible by vaccines, antibiotics, and safe abortions. 5155671767
Reposted by Donald SzlosekRichard McElreath 🐈⬛ @rmcelreath.bsky.social · 17/06/2026Remembering this WSJ graphic from 2007. Been thinking about "reverse statistics" lately, which means deriving the minimal set of assumptions that justify a result. Here I wonder if there is any function of the data that when max/min would produce such a curve. Ordinary Worst Squares? 1010614
Reposted by Donald SzlosekAndrew Gelman et al. @statmodeling.bsky.social · 17/06/2026R wins statistics award. statmodeling.stat.columbia.edu/2026/06/17/5...statmodeling.stat.columbia.edu R wins statistics award. | Statistical Modeling, Causal Inference, and Social Science 0105
Donald Szlosek @dszlosek.bsky.social · 17/06/2026Today I was reminded of a conversation with Terry Therneau at an R/Medicine conference some years ago (maybe 2019) where he told me a different version of the classic quote by George Box: “Remember that all models are wrong; the practical question is how wrong do they have to be to not be useful” 010
Reposted by Donald SzlosekDepartment of Statistics @oxfordstatistics.bsky.social · 17/06/2026👏 Our congratulations to Emeritus Professor Brian Ripley on being named a 2026 Rousseeuw Prize laureate. The award recognises the contributions of Professor Ripley and the international R Core Team to statistical computing worldwide. Find out more at tinyurl.com/yjhcj4ja 032
Donald Szlosek @dszlosek.bsky.social · 14/06/2026I feel like every time a new editor joins a major journal there should be a public hearing like we do with FDA commissioners. #academicsky #episky 120
Donald Szlosek @dszlosek.bsky.social · 10/06/2026I could not be happier to be a part of this wonderful group as a new co-organizer of the Boston R User Group! I’m excited to help restart this wonderful community along with @rachaeldempsey.bsky.social and @damiepak.bsky.social #rstats #statistics #rstats #boston 3223
Donald Szlosek @dszlosek.bsky.social · 10/06/2026I think about this figure from @stephensenn.bsky.social's Statistical Issues in Drug Development a lot (Ch. 7) alot. A useful reminder that baseline adjustment is often about precision not just “controlling for confounding.” #StatsSky #Statistics #EpiSky 2143
Donald Szlosek @dszlosek.bsky.social · 29/05/2026Honestly, Dawid and Skene's 1979 paper is one of the most captivating and well-written statistics papers I've ever read. It's remarkable that, nearly 50 years later, people are still discussing it, building on its ideas, and even finding inspiration in it to pursue statistics themselves. 010
Reposted by Donald SzlosekAndrew Gelman et al. @statmodeling.bsky.social · 29/05/2026The Kappa Zoo: David Eubanks’s online monograph on rating models statmodeling.stat.columbia.edu/2026/05/28/t...statmodeling.stat.columbia.edu The Kappa Zoo: David Eubanks’s online monograph on rating models | Statistical Modeling, Causal Inference, and Social Science 071
Donald Szlosek @dszlosek.bsky.social · 29/05/2026The basis of science is to have reproducible work. I would say the methods and results are the most important - everything else is just context 011
Donald Szlosek @dszlosek.bsky.social · 28/05/2026I was literally trying to find better ways to plot multivariate distributions a few weeks ago - outstanding 020
Reposted by Donald SzlosekMatthew Kling @matthewkling.bsky.social · 27/05/2026Announcing #RStats package ggcube, now on CRAN -- make 3D #ggplot2 figures using `coord_3d()` matthewkling.github.io/ggcube/ 812831
Reposted by Donald SzlosekGary Collins @gscollins.bsky.social · 21/05/2026*** NEW PAPER *** The CRT-Estimands Framework - a consensus based extension of the ICH E9(R1) addendum for cluster randomised trials - now been published in the @bmj.com. -> www.bmj.com/content/393/... + commentary in @jama.com -> jamanetwork.com/journals/jam... @unibirmingham.bsky.social 043