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Jonathan N. Katz

@jnkatz.bsky.social
1.9K followers 1.7K following 7 posts

Professor at Caltech. Social Sciences and Statistics.

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Reposted by Jonathan N. Katz
Linde Center for Science, Society, & Policy at Caltech @caltechlcssp.bsky.social · 23/10/2025
Register here: caltech.zoom.us/webinar/regi... #ElectionScienceOfficeHours @jnkatz.bsky.social @rmichaelalvarez.bsky.social @caltech.edu @caltechlcssp.bsky.social #CaltechElectionIntegrity
caltech.zoom.us
Welcome! You are invited to join a webinar: A Conversation with Caltech's Jonathan N. Katz: State Redistricting Impacts Around the Nation. After registering, you will receive a confirmation email abou...
Please join us on Tuesday, October 28, 2025 at 1:00pm Pacific for the next episode of Election Science Office Hours, a webinar series presented by the Caltech Election Integrity Project and moderated ...
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jessamyn @librarian.bsky.social · 29/03/2025
Every Californian with an email address and an internet connection can now visit California’s Bookshelf and access more than 300,000 ebooks and audiobooks. www.library.ca.gov/uploads/2025...
Two women standing on top of a gnarled ancient pine tree  on Sentinel Dome with a mountain range viewable in the background
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Florian Ederer @florianederer.bsky.social · 22/03/2025
Innovation is afoot in the ski industry. BOA boots are changing skiing ... and ski racing. www.skimag.com/gear/boa-ski...
skimag.com
BOA Boots Are Changing Skiing—So Why Won’t Racers Wear Them?
Skiers swear by BOA technology, yet the world’s best racers refuse to make the switch. Do they know something we don’t?
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Vincent Pons @vinpons.bsky.social · 13/03/2025
We are very happy to publish the "National Elections Database," including the results of 1,023 presidential and 2,962 parliamentary elections conducted worldwide since 1946! www.nationalelectionsdatabase.com with Benjamin Marx and Vincent Rollet
nationalelectionsdatabase.com
Overview
National Elections Database
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Holden Thorp @holdenthorp.bsky.social · 12/03/2025
Happy 10 year birthday to Science Advances! Had fun writing this up with our editor, Laura Remis. @science.org www.science.org/doi/10.1126/...
science.org
10 years of progress and change
Ten years ago, Science Advances published its very first issue (www.science.org/toc/sciadv/1/1). It was a monthly issue and had 12 papers in total. Since then, much has happened for the journal, for s...
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G Elliott Morris @gelliottmorris.com · 07/03/2025
538-style poll collection has now been recreated by a small group of fans and former staff. all fully transparent and public now. return of live public aggregation is imminent docs.google.com/spreadsheets...
docs.google.com
Polls
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John Skiles Skinner @skiles.blue · 01/03/2025
I got laid off today, with the rest of 18F. 18F was an elite federal software shop. We made gov't websites work better, more efficiently for the American people. We saved taxpayers from getting screwed over by contractors. And were fired for it. We made this website to tell our story: 18f.org
18f.org
We're not done yet | 18F
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ICPSR @icpsr.bsky.social · 21/02/2025
#UMISR: Preserve At-Risk Government Data! DataLumos, an open-access archive at ICPSR, is working to preserve/share critical govt data. Help keep the data accessible. Donate: datalumos.org Explore & contribute: myumi.ch/egrbW Volunteer: icpsr-data-rescue@umich.edu #DataPreservation #SocialScience
Graphic promoting data protection efforts. The background features a pattern of yellow, blue, and white triangles. A large navy blue circular overlay at the center contains the message in bold yellow text: "HELP US PROTECT AT-RISK DATA" Below, in smaller white text: "Your contribution TODAY shapes TOMORROW" The University of Michigan ISR logo appears at the top of the circular overlay.
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Vincent Arel-Bundock @vincentab.bsky.social · 14/02/2025
Rdatasets is a collection of 2300 free and documented datasets in CSV format. It's a great resource for teaching and exploration! The new `get_dataset()` function from the {marginaleffects} 📦 allows you to search and load them directly in #Rstats. vincentarelbundock.github.io/Rdatasets/ar...
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Holden Thorp @holdenthorp.bsky.social · 22/01/2025
All - @science.org now has a @bsky.app share button! Enjoy!
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Steven S Smith @profstevensmith.bsky.social · 30/12/2024
Looking for free, short readings on elements of congressional politics for your course? Check this out. stevesnotes.substack.com
stevesnotes.substack.com
Steve's Notes on Congressional Politics | Steven S. Smith | Substack
Insightful briefs on the politics of the the U.S. Congress. Click to read Steve's Notes on Congressional Politics, by Steven S. Smith, a Substack publication with hundreds of subscribers.
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Noah Greifer @noahgreifer.bsky.social · 14/12/2024
If you have an issue where Dropbox is constantly syncing while @posit.co #RStudio is open, one solution is to run the following code in Terminal: find "Dropbox" -type d -name ".Rproj.user" -print0 | while IFS= read -r -d $'\0' folder; do xattr -w com.dropbox.ignored 1 "$folder"; done #rstats
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R. Michael Alvarez @rmichaelalvarez.bsky.social · 11/12/2024
Last week, Jacob Morrier and I presented about work that dramatically speeds up probabilistic record linkage using GPU acceleration. Documentation and code for Fast-ER is available, fast-er.readthedocs.io/en/latest/ But better yet, watch the video! youtu.be/wsv__0a_KDY?...
youtu.be
Fast ER GPU Accelerated Record Linkage in Python by Dr R Michael Alvarez and Jacob Morrier CalTech
YouTube video by Data Analytics Colloquium
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David Karol @davidkarol.bsky.social · 10/12/2024
Voters are mostly partisans who rationalize, swing voters are often ignorant and voters project their views onto their candidates. But this has always been true! The media was better once, but there was no golden age. Most of their grandparents did not read Walter Lippmann's column.
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Richard McElreath 🐈‍⬛ @rmcelreath.bsky.social · 09/12/2024
Very nice example of how useful comparison (or trend calculation) usually needs something more than coefficients. They have a nice page on the general idea that is hidden down in the thread: ourworldindata.org/age-standard...
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Jessica Hullman @jessicahullman.bsky.social · 06/12/2024
I'm teaching a grad seminar this winter on Prediction for Decision-making. We'll look at what it means to make good predictions for decision-making from various angles, with a focus on decisions for & about people. Reading list: statmodeling.stat.columbia.edu/2024/12/06/n... Suggestions welcome!
statmodeling.stat.columbia.edu
New Course: Prediction for (Individualized) Decision-making | Statistical Modeling, Causal Inference, and Social Science
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Vincent Arel-Bundock @vincentab.bsky.social · 02/12/2024
Our JSS article is out! And now I get to focus on {marginaleffects} 1.0.0. Stay tuned. www.jstatsoft.org/article/view...
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Matthew G Nagler @matthewgnagler.bsky.social · 30/11/2024
This is good advice. People with stable handles, bios, and a post or two present well to would-be followers. Consider also a photo or thoughtful logo of yourself.
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Hadley Wickham @hadley.nz · 29/11/2024
If you're interested in trying out LLMs in #rstats but don't know where to begin, I've added a few two vignettes to elmer: elmer.tidyverse.org/articles/elm... and elmer.tidyverse.org/articles/pro...
elmer.tidyverse.org
Getting started with elmer
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Vincent Arel-Bundock @vincentab.bsky.social · 29/11/2024
New notebook: Sample Size Calculations in #RStats : Money and Power arelbundock.com/posts/money_...
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Carlisle Rainey 👨‍💻📊📚 @carlislerainey.bsky.social · 26/11/2024
Boosting Anton's starter pack to #StatsSky and #polisky. Lots of people worth following here. bsky.app/starter-pac...
bsky.app
Political Methodology
Join the conversation
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Colin Camerer @cfcamerer.bsky.social · 27/11/2024
Great to see @aleximas.bsky.social and gang of coauthors measuring salience *independently of choice* with an early well-trained algorithm (from @caltech.edu btw) that predicts visual attention for any image (a la Li and me QJE academic.oup.com/qje/article-...)
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Andrew Little @anthlittle.bsky.social · 27/11/2024
After a review process so long and intensive that the title changed twice, I'm excited/relieved that "How to Distinguish Motivated Reasoning from Bayesian Updating" is accepted at @polbehavior.bsky.social. osf.io/preprints/os... Here is how it's relevant for your Thanksgiving dinner 🦃👇
osf.io
OSF
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Richard McElreath 🐈‍⬛ @rmcelreath.bsky.social · 27/11/2024
How does Approximate Bayesian Computation *ABC) work? @rabaath.bsky.social has a classic nice simple intro the ABC using the problem of infering the number of socks in a sample of laundry. There's a movie and a page with all the code. www.sumsar.net/blog/2015/07...
sumsar.net
Tiny Data, Approximate Bayesian Computation and the Socks of Karl Broman: The Movie
This is a screencast of my UseR! 2015 presentation: Tiny Data, Approximate Bayesian Computation and the Socks of Karl Broman. Based on the original blog post it is a quick’n’dirty …
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Jennifer N. Victor @jenvictor.bsky.social · 27/11/2024
Yes, it was an anti-incumbent environment, *globally*—but the US had weathered the pandemic economy so much better than everywhere else, it was totally reasonably to think that the incumbent party could prevail. It was not a forgone conclusion. It was close, but still decisive against incumbents.
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Stephanie Wang @sweiwang.bsky.social · 26/11/2024
Now that @jacksonmatthewo.bsky.social has arrived, it’s a real network
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Richard McElreath 🐈‍⬛ @rmcelreath.bsky.social · 26/11/2024
Since it is inefficient to attempt to educate every reviewer individually, I am yeeting into your feed this clear paper from Gelman, Hill, and Yajima on how Bayesians can do even better than correcting for multiple comparisons. arxiv.org/abs/0907.2478
arxiv.org
Why we (usually) don't have to worry about multiple comparisons
Applied researchers often find themselves making statistical inferences in settings that would seem to require multiple comparisons adjustments. We challenge the Type I error paradigm that underlies t...
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Hadley Wickham @hadley.nz · 25/11/2024
I'm writing up a brief history of the tidyverse? What do you want to know about it? #rstats
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Anton Strezhnev @astrezh.bsky.social · 25/11/2024
Put together a quick starter pack for political methodologists (broadly defined) who have made their way over to BlueSky. If I've missed folks, please let me know! go.bsky.app/JBavA7x
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Derek Willis @dwillis.bsky.social · 25/11/2024
OpenElections update: we've posted official precinct results data for 17 of Michigan's 83 counties (20%) and will continue to keep rolling. You can help and we can get you started! github.com/openelection...
github.com
2024 General Election Precinct Results · Issue #69 · openelections/openelections-data-mi
Using Tabula, OCR or whatever method you can, parse precinct-level results for the following counties. Original sources are in individual county files in the sources-mi repository. The goal is to c...
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Brad Shapiro @btshapir.bsky.social · 24/11/2024
Now that I seem to have gotten new followers interested in my editor takes, If you're asked to do a referee report and you're not sure if you have enough time, just quickly reply to the editor that you don't have time. Do not let the request languish. Ghosting a request is the worst option.
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R. Michael Alvarez @rmichaelalvarez.bsky.social · 24/11/2024
All episodes of the Election Science Office Hours podcast are now available on Apple Podcasts! Give them a listen, and watch this space for updates about the next set of episodes. podcasts.apple.com/us/podcast/t...
podcasts.apple.com
The Election Science Office Hours Podcast
Government Podcast · 12 Episodes · Updated Biweekly
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Stephanie Wang @sweiwang.bsky.social · 20/11/2024
To celebrate Colin being on Bluesky (@cfcamerer.bsky.social), a reminder to submit to "Mindful Economics: A special issue in honour of Colin Camerer" at JEBO starting December 1 that Alex Brown, Ian Krajbich, Marco Palma, and I are guest-editing www.sciencedirect.com/special-issu...
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Holden Thorp @holdenthorp.bsky.social · 21/11/2024
AAAS would like to learn more about researchers’ experience with CC BY and other open licenses. What impacts have such licenses had on downstream uses of your research output? Scientists, please consider taking our short survey here: bit.ly/48iDDO7
bit.ly
Author awareness survey
Take this survey powered by surveymonkey.com. Create your own surveys for free.
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Cameron @cameron.stream · 21/11/2024
Notes on Bluesky etiquette: - Likes are messages to creators that you like that thing. Send em a little happy boop. - Reskeets mean "I think other people should see this". - Reskeets are the best way to boost content -- likes don't generally make it into most feeds. - Don't be an asshole
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R. Michael Alvarez @rmichaelalvarez.bsky.social · 16/11/2024
Congrats @jnkatz.bsky.social ! www.caltech.edu/about/news/k...
caltech.edu
Jonathan N. Katz Wins Career Achievement Award in Political Methodology
Katz, the Kay Sugahara Professor of Social Sciences and Statistics, has won a career achievement award from the Society for Political Methodology.
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garyking.bsky.social @garyking.bsky.social · 04/01/2024
New paper: "How American Politics Ensures Electoral Accountability in Congress" with @DannyCEbanks and @Jonathan_N_Katz. We'd appreciate an email with any comments you might have. See gking.harvard.edu/acc
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Vincent Arel-Bundock @vincentab.bsky.social · 20/10/2023
{marginaleffects} 0.16.0: A unified interface to interpret results from 100+ statistical and machine learning models in #RStats! Predictions, slopes, differences, ratios & much more! See our new vignettes on Matching, Inverse Probability Weighting & ML: marginaleffects.com
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