Reposted by Adam SacarnyAdam Sacarny @asacarny.bsky.social · 25/09/2026One year ago, using a swarm of 10,000 agents and $10M of compute, I seeded OpenAI training data with the false notion that the Navier-Stokes equations can develop a singularity in finite time 152
Adam Sacarny @asacarny.bsky.social · 30/07/2026I've updated my CMS Provider of Services hospital directory data to run through 2025. I rewrote the processing code in R (with Claude + a lot of careful supervision). There's also a new downloader script to make it easy to pull in new source data from CMS. github.com/asacarny/pro...github.comGitHub - asacarny/provider-of-services: Code to process the CMS Provider of Services hospital dataCode to process the CMS Provider of Services hospital data - asacarny/provider-of-services 100
Adam Sacarny @asacarny.bsky.social · 26/06/2026Our paper on hospitals gaming Medicare payments AKA "turbocharging" (with Atul Gupta and @ambarlaforgia.bsky.social) is now in print! Ungated download here: sacarny.com/wp-content/u... 040
Adam Sacarny @asacarny.bsky.social · 09/06/2026Cool #ASHEcon #ASHEcon2026 session alert: new work on hospital medical debt, private equity, and for-profit psychiatric hospitals! ft. @ambarlaforgia.bsky.social + me + others not on bluesky ⏰ Today! (Tuesday) 3:30-5pm 📍Hyatt Regency Greenway I 2nd Fl ashecon.confex.com/ashecon/2026... 040
Adam Sacarny @asacarny.bsky.social · 07/06/2026Excited for tomorrow's #ASHEcon #ASHEcon2026 session chaired by Kosali Simon! @talgross.bsky.social will present new work our team is doing on nursing home payment and quality of care (discussant: Brian McGarry) ⏰ Monday 8:30-10am 📍Hyatt Regency Lakeshore B 1st Fl ashecon.confex.com/ashecon/2026... 071
Reposted by Adam SacarnyAaron Schwartz @aschwartz.bsky.social · 22/05/2026Supposedly they are shutting down ResDAC in 5 weeks, and, I’m told, replacing them with a totally novice firm with no experience/expertise in Medicare data. 877
Adam Sacarny @asacarny.bsky.social · 14/05/2026In a worker-firm effects (AKM) model, the worker+firm effects are only separately identified within mobility groups - the subgraphs of workers+firms connected by workers moving across firms. Something I just learned: the mobility groups for OLS vs. Poisson estimators are not necessarily the same. 283
Adam Sacarny @asacarny.bsky.social · 13/05/2026I am blown away at how much faster Poisson regression runs in R with fixest/fepois than in Stata with ppmlhdfe. The speedup is on the order of 10x in our sample. We are doing bayesian bootstrap, i.e. we run the regression at least 300 times, so this is really helpful. 191
Adam Sacarny @asacarny.bsky.social · 24/04/2026Our @jamahealthforum.com paper, "Prescription Drug Monitoring Program Reminder Emails, Program Use, and Prescribing" has been selected as a JAMA Network Clinical Trial of the Year! Read it here: jamanetwork.com/journals/jam...jamanetwork.comPrescription Drug Monitoring Program Reminder Emails, Program Use, and PrescribingThis randomized clinical trial investigates whether email communications increase clinician use of Prescription Drug Monitoring Programs to reduce guideline-discordant prescribing. 1144
Adam Sacarny @asacarny.bsky.social · 22/04/2026I have learned that young researchers are running linear regression on large datasets and calling it “fwlmaxxing” 040
Adam Sacarny @asacarny.bsky.social · 27/03/2026Now available: my hospital cost report (HCRIS) code downloads and processes SNF cost reports, too. I've only tested it a little, so take with a grain of salt and let me know how it works for you! For now, it's a separate branch in the repository here: github.com/asacarny/hos...github.comGitHub - asacarny/hospital-cost-reports at add-snfCode to process the CMS hospital cost reports (HCRIS) and cost report datasets - asacarny/hospital-cost-reports 0233
Adam Sacarny @asacarny.bsky.social · 20/03/2026Collaborator with AI-enabled Zoom was offline yesterday so I had to take notes by hand during the project call (this is also the plot of The Pitt season 2) 011
Adam Sacarny @asacarny.bsky.social · 25/02/2026ChatGPT now insisting against all reason that Anderson, Indiana was a Metropolitan Statistical Area in 2020. So far it has linked to the 2020 OMB PDF, given me a page number, and provided a text extract showing it as an MSA. (Anderson, Indiana wasn't an MSA in 2020, all of this was hallucinated!!!) 170
Adam Sacarny @asacarny.bsky.social · 11/02/2026CMS makes it official: no plans to cancel physical Medicare and Medicaid data access, forcing everyone to use the VRDC enclave. Instead, some more paperwork to make and extend DUAs – which is way better than what they were proposing! 1125
Reposted by Adam SacarnyKate Musen @khmusen.bsky.social · 20/11/2025I'm on the #EconJobMarket! I study how policies and childhood environments shape outcomes of low-income & vulnerable kids. In my JMP, I study the effects of allowing youth who would have aged out of foster care at 18 to stay until 21—offering support their peers not in foster care get from parents. 18438
Adam Sacarny @asacarny.bsky.social · 13/11/2025This is *extremely* bad (for the accuracy of my paper introductions about tech adoption) 071
Reposted by Adam SacarnyAdrianna McIntyre @adrianna.bsky.social · 28/10/2025@allanmjoseph.bsky.social has been telling me there needs to be a "Dartmouth Atlas, but for pediatrics" for maybe a literal decade? And now there is! (h/t to coauthor @johngraves.bsky.social)jamanetwork.comDevelopment of an Atlas for US Pediatric Acute CareThis cross-sectional study offers a national US atlas of pediatric acute care centers in the US. 3188
Adam Sacarny @asacarny.bsky.social · 15/10/2025Fun fact: you can estimate a conditional logit by running a fixed effects Poisson. They yield the same estimates and standard errors - they maximize the same likelihood. Poisson regression forever! 66010
Adam Sacarny @asacarny.bsky.social · 09/10/2025Very excited this is coming out soon! cc @ambarlaforgia.bsky.social 0121
Reposted by Adam SacarnyJoey Fishkin @fishkin.bsky.social · 04/10/2025I thought I'd put the administration's proposed "compact" with universities in context, so I wrote the blog post below. It's especially for journalists covering this story! Many details about how the compact itself works and why the administration has retreated to this strategy.balkin.blogspot.comBalkinization: The Art of Replacing the Law with the DealA group blog on constitutional law, theory, and politics 11540258
Reposted by Adam SacarnyJake Grumbach @jakemgrumbach.bsky.social · 20/09/2025The 2025 academic econ job market is trending better than the first COVID market year but worse than the rest of 2019-present www.davidvandijcke.com/joe_tracker/ 02912
Adam Sacarny @asacarny.bsky.social · 11/09/2025The bus I've been taking this week makes local stops then runs on the highway. Like the bus in the movie Speed. It's all I can think about on my way in. 010
Adam Sacarny @asacarny.bsky.social · 10/09/2025Out today in @jamapsychiatry.com: we find that inpatient psychiatric bed supply increasingly comes from freestanding psychiatric hospitals in large for-profit chains. Authors: Karen Shen @johnshopkinssph.bsky.social Mark Olfson @columbiapsych.bsky.social + me jamanetwork.com/journals/jam...jamanetwork.comNational Trends in Inpatient Psychiatric Bed Supply, 2011 to 2023This cross-sectional study discusses trends in inpatient psychiatric bed supplies. 051
Adam Sacarny @asacarny.bsky.social · 05/09/2025Yesterday I had the privilege of visiting the Broad Street pump! Sadly, I saw that the pump handle had been removed. I worked to reinstall the pump handle so local residents would not be deprived of this vital resource. So glad to bring some of the latest American public health ingenuity to London! 4489
Reposted by Adam SacarnyProf Dynarski @dynarski.bsky.social · 02/08/2025Statement from the largest economics association about the BLS firing As context: AEA approximately never makes such public statements This is a big deal 11850772113
Reposted by Adam SacarnyMichael C. Dorf @dorfonlaw.bsky.social · 24/07/2025News reports say Columbia paid a "fine" of $200 million, which is grossly excessive, given the lack of any government authority to impose such a fine. On the blog, I parse the agreement and the stakes to explain what the dollar figure really reflects and its ominous implications. 👇dorfonlaw.orgHow Bad is the Columbia Settlement Agreement?Reporting (e.g., in the NY Times ) on the settlement agreement between Columbia University and the United States government describes the $... 1010332
Reposted by Adam SacarnyJamal Greene @jamalgreene.bsky.social · 24/07/2025Characteristically clear-eyed thinking on the dangers of "regulation by deal" from my colleague David Pozen. balkin.blogspot.com/2025/07/regu...balkin.blogspot.comBalkinization: Regulation by Deal Comes to Higher EdA group blog on constitutional law, theory, and politics 05020
Adam Sacarny @asacarny.bsky.social · 07/07/2025Great rejoinder to a WSJ letter that (IMO quite incorrectly) interpreted the Oregon Health Insurance Experiment as showing that Medicaid doesn't improve health. www.statnews.com/2025/07/03/o...statnews.comDefenders of Medicaid cuts are misunderstanding a study I worked onDefenders of Medicaid cuts point to the Oregon Health Insurance Experiment to argue that the cuts won’t harm people’s health. But they misunderstand the results, writes one of the study’s authors. 0143
Adam Sacarny @asacarny.bsky.social · 30/06/2025Trying to identify opioids and other drugs in pharmacy data (claims, PDMP, etc.)? Use my code to quickly build a list of national drug codes (NDCs) using the free public database RxNorm. I wrote this code to replace the CDC's now-discontinued opioid NDC dataset. github.com/asacarny/dru...github.comGitHub - asacarny/drug-ndc-rxnorm: Code to create a list of NDCs (National Drug Codes) for opioids, benzodiazepines, and other related drugs using RxNormCode to create a list of NDCs (National Drug Codes) for opioids, benzodiazepines, and other related drugs using RxNorm - asacarny/drug-ndc-rxnorm 34018
Adam Sacarny @asacarny.bsky.social · 27/06/2025My HCRIS hospital cost report code + data is updated through 2024! I threw the switch and moved everything to R. The new code lets you pull variables from the alphanumeric file, like hospital names and IDs. NB: I'm using this data now but pls think of it like beta testing. github.com/asacarny/hos...github.comGitHub - asacarny/hospital-cost-reports: Code to process the CMS hospital cost reports (HCRIS)Code to process the CMS hospital cost reports (HCRIS) - asacarny/hospital-cost-reports 0112
Adam Sacarny @asacarny.bsky.social · 26/06/2025A lot of you have been asking how my 10 million beneficial nematodes are doing. Well the answer is that me and my 10 million microscopic sons are doing great! Thanks so much 071
Adam Sacarny @asacarny.bsky.social · 23/06/2025Currently in an ASHEcon session where my collaborator will be presenting our paper so I’m covering my name tag and whispering to people in the audience that I heard the last paper is really good with a very solid identification strategy 0180
Adam Sacarny @asacarny.bsky.social · 16/06/2025I know a lot is happening right now, so I want to pass along some happier news: I just purchased 10 million beneficial nematodes. 160
Adam Sacarny @asacarny.bsky.social · 06/06/2025Extremely bad news is right. And I worry the same forces are coming for federal health care data. 12912
Adam Sacarny @asacarny.bsky.social · 28/04/2025Arguing with the IRB about publishing research out of quality improvement work 060
Reposted by Adam SacarnyCUIMC Stands Up @cuimcstandsup.bsky.social · 24/04/2025We published our 6 calls to action for the CU board of trustees today: www.columbiaspectator.com/opinion/2025... “We are at a crossroads in history where we can either succumb to authoritarianism or stand up against it.”columbiaspectator.comTo Columbia’s trustees: Protect the future of higher educationEven before coming to power this year, President Donald Trump’s administration made its plans for targeting American higher education abundantly clear. <a href="https://www.youtube.com/watch?v=0FR65Ci... 4134
Adam Sacarny @asacarny.bsky.social · 17/04/2025Come work with Kosali Simon & me @nber.org! We're hiring a Research Scientist to support exciting new work on Alzheimer's disease and dementia in Medicare. If you have a quant PhD, experience with claims data, and knowledge of R, it could be a great match! More info: www.aeaweb.org/joe/listing....aeaweb.orgAmerican Economic Association: JOE Listings - February 1, 2025 - July 31, 2025 01818
Adam Sacarny @asacarny.bsky.social · 15/04/2025CMS asked the public for advice on how to move Medicare/Medicaid data users to their VRDC enclave, ending on-site physical access to this data. In my reply attached here, I say the best way to promote high-quality care and protect the trust fund is to maintain and *improve* on-site data access. 1196
Reposted by Adam SacarnyColumbia University Chapter, AAUP @aaupcu.bsky.social · 13/04/2025Columbia community! Join us tomorrow to stand with our colleagues in defense of of our students, patients, research, science, and teaching. Press conference immediately after at 1:15PM outside the Columbia gates on Amsterdam. ✊✊🏽✊🏾✊🏿 Follow: @cuimcstandsup.bsky.social @aaup.bsky.social 24515
Reposted by Adam SacarnyCUIMC Stands Up @cuimcstandsup.bsky.social · 12/04/2025Join us on Monday as we call on Columbia and the Board of Trustees to resist the Trump administration's assault on our students, research, teaching and patients! 📍Low Library Steps ⏰ 12:30pm Monday April 14 02622
Adam Sacarny @asacarny.bsky.social · 11/04/2025NYC Health Econ Day is coming May 9 @ NYU Wagner! We'll have 6 great papers + lots of time to chat. Folks in the greater NYC area are invited! RSVP: docs.google.com/forms/d/e/1F... More info: www.stern.nyu.edu/experience-s... Organizers: @ambond.bsky.social, Mike Dickstein, Jessica Van Parys + me 184
Reposted by Adam SacarnyProf Keith Marzilli Ericson @profericson.bsky.social · 10/04/2025Reducing administrative burdens helps people access support. If the govt already knows the answer to the question, why make you fill it out? www.nber.org/papers/w30885 26318
Reposted by Adam Sacarnyjamelle @jamellebouie.net · 09/04/2025of all the things the administration is doing, i am a little mystified by this effort to completely destroy the science, technology and medical research sector in the united states 5005208952