Associate Professor @columbiahpm.bsky.social. Also @nber.org & @j-pal.bsky.social. Economics & health policy. #econsky #healthpolicy #medsky 📈🚞🐈🗽🏳️‍🌈 http://sacarny.com Posts represent my views, not my employer'shttps://bsky.app/profile/asacarny.bsky.socialhttps://bsky.app/profile/asacarny.bsky.social/post/3mrv2lnxcv22eI'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. https://github.com/asacarny/provider-of-services30 Jul 2026 18:21 +0000at://did:plc:bea2i2ug7svuxl6cmkoihpie/app.bsky.feed.post/3mrv2lnxcv22ehttps://bsky.app/profile/asacarny.bsky.social/post/3mp7crda2xk2dOur paper on hospitals gaming Medicare payments AKA "turbocharging" (with Atul Gupta and @ambarlaforgia.bsky.social) is now in print! Ungated download here: https://sacarny.com/wp-content/uploads/2026/06/GLS-Turbocharging-2025-10-14.pdf [contains quote post or other embedded content]26 Jun 2026 15:58 +0000at://did:plc:bea2i2ug7svuxl6cmkoihpie/app.bsky.feed.post/3mp7crda2xk2dhttps://bsky.app/profile/asacarny.bsky.social/post/3mol6c4vbtk2aMy (41M) 17 antagonistic agents have unionized18 Jun 2026 15:45 +0000at://did:plc:bea2i2ug7svuxl6cmkoihpie/app.bsky.feed.post/3mol6c4vbtk2ahttps://bsky.app/profile/asacarny.bsky.social/post/3mnujbbmkik27Cool #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 https://ashecon.confex.com/ashecon/2026/meetingapp.cgi/Session/632009 Jun 2026 15:30 +0000at://did:plc:bea2i2ug7svuxl6cmkoihpie/app.bsky.feed.post/3mnujbbmkik27https://bsky.app/profile/asacarny.bsky.social/post/3mnpzm2gd7k2lExcited 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 https://ashecon.confex.com/ashecon/2026/meetingapp.cgi/Session/665407 Jun 2026 20:39 +0000at://did:plc:bea2i2ug7svuxl6cmkoihpie/app.bsky.feed.post/3mnpzm2gd7k2lhttps://bsky.app/profile/asacarny.bsky.social/post/3mltlbadjbs2pIn 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.14 May 2026 19:43 +0000at://did:plc:bea2i2ug7svuxl6cmkoihpie/app.bsky.feed.post/3mltlbadjbs2phttps://bsky.app/profile/asacarny.bsky.social/post/3mlp42aga2k2tI 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.13 May 2026 01:00 +0000at://did:plc:bea2i2ug7svuxl6cmkoihpie/app.bsky.feed.post/3mlp42aga2k2thttps://bsky.app/profile/asacarny.bsky.social/post/3mko5zmkbxc2mThere are two Claudes29 Apr 2026 22:37 +0000at://did:plc:bea2i2ug7svuxl6cmkoihpie/app.bsky.feed.post/3mko5zmkbxc2mhttps://bsky.app/profile/asacarny.bsky.social/post/3mkaw2jrh4s2iOur @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: https://jamanetwork.com/journals/jama-health-forum/fullarticle/2842674?guestAccessKey=777e58f4-eb0e-48a6-a19e-ecb4006cb40924 Apr 2026 16:10 +0000at://did:plc:bea2i2ug7svuxl6cmkoihpie/app.bsky.feed.post/3mkaw2jrh4s2ihttps://bsky.app/profile/asacarny.bsky.social/post/3mk3woyabuk2jI have learned that young researchers are running linear regression on large datasets and calling it “fwlmaxxing”22 Apr 2026 16:38 +0000at://did:plc:bea2i2ug7svuxl6cmkoihpie/app.bsky.feed.post/3mk3woyabuk2jhttps://bsky.app/profile/asacarny.bsky.social/post/3mjxif3sz3k2pAI not liking my meeting style20 Apr 2026 22:11 +0000at://did:plc:bea2i2ug7svuxl6cmkoihpie/app.bsky.feed.post/3mjxif3sz3k2phttps://bsky.app/profile/asacarny.bsky.social/post/3mi2n2mmfhc2bNow 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: https://github.com/asacarny/hospital-cost-reports/tree/add-snf27 Mar 2026 17:23 +0000at://did:plc:bea2i2ug7svuxl6cmkoihpie/app.bsky.feed.post/3mi2n2mmfhc2bhttps://bsky.app/profile/asacarny.bsky.social/post/3mhj3t3kkws2iCollaborator 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)20 Mar 2026 17:59 +0000at://did:plc:bea2i2ug7svuxl6cmkoihpie/app.bsky.feed.post/3mhj3t3kkws2ihttps://bsky.app/profile/asacarny.bsky.social/post/3mfnihqwrz22lChatGPT 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!!!)25 Feb 2026 01:05 +0000at://did:plc:bea2i2ug7svuxl6cmkoihpie/app.bsky.feed.post/3mfnihqwrz22lhttps://bsky.app/profile/asacarny.bsky.social/post/3memasrb5zk2eCMS 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!11 Feb 2026 19:51 +0000at://did:plc:bea2i2ug7svuxl6cmkoihpie/app.bsky.feed.post/3memasrb5zk2ehttps://bsky.app/profile/asacarny.bsky.social/post/3m5igey5zg22bThis is *extremely* bad (for the accuracy of my paper introductions about tech adoption) [contains quote post or other embedded content]13 Nov 2025 05:23 +0000at://did:plc:bea2i2ug7svuxl6cmkoihpie/app.bsky.feed.post/3m5igey5zg22bhttps://bsky.app/profile/asacarny.bsky.social/post/3m3auofqtkc2kFun 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!15 Oct 2025 18:27 +0000at://did:plc:bea2i2ug7svuxl6cmkoihpie/app.bsky.feed.post/3m3auofqtkc2khttps://bsky.app/profile/asacarny.bsky.social/post/3m2rrr3w6vc2wVery excited this is coming out soon! cc @ambarlaforgia.bsky.social [contains quote post or other embedded content]09 Oct 2025 18:25 +0000at://did:plc:bea2i2ug7svuxl6cmkoihpie/app.bsky.feed.post/3m2rrr3w6vc2whttps://bsky.app/profile/asacarny.bsky.social/post/3lyl2gpatak2vThe 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.11 Sep 2025 15:22 +0000at://did:plc:bea2i2ug7svuxl6cmkoihpie/app.bsky.feed.post/3lyl2gpatak2vhttps://bsky.app/profile/asacarny.bsky.social/post/3lyiqdvtips2lOut 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 https://jamanetwork.com/journals/jamapsychiatry/article-abstract/283869810 Sep 2025 17:16 +0000at://did:plc:bea2i2ug7svuxl6cmkoihpie/app.bsky.feed.post/3lyiqdvtips2lhttps://bsky.app/profile/asacarny.bsky.social/post/3ly3oio2rys2tYesterday 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!05 Sep 2025 12:38 +0000at://did:plc:bea2i2ug7svuxl6cmkoihpie/app.bsky.feed.post/3ly3oio2rys2t