🚨New paper!🚨Who orders more testing: male physicians or female physicians? And what are the implications on patient outcomes? We examine these questions in the emergency department (ED) in @jamainternalmed.com .🧵1/
Dan Ly
@meddly.bsky.social
Physician and health economist. Assistant prof at UCLA GIM&HSR. Studying physician decision-making and health care disparities. https://sites.google.com/view/danply/
Excited for our #ASHEcon panel TUESDAY 10:15am on natural experiments in acute care. Papers on decisionmaking in surgeon-anesthesiologist dyads, emergency attending peer dyads, and clustering of patient acuities. ashecon.confex.com/ashecon/2026...
Reminder, if you’re going to @ashecon.bsky.social 2026, come to our Wednesday session of creative uses of recession discontinuity with some of the best in the business, including @aschwartz.bsky.social, @vinisingh.bsky.social, @dzeltzer.bsky.social, and @mlbarnett.bsky.social!
Dan Ly@meddly.bsky.social · 5mo agoIf you're buying plane tickets to ASHEcon '26, make sure you stay for our session (last of the conference) of 3 RDs studying heuristics, stigma, & guidelines. With @aschwartz.bsky.social, @vinisingh.bsky.social, @dzeltzer.bsky.social, and @mlbarnett.bsky.social! ashecon.confex.com/ashecon/2026...
New diff-in-diff paper in @jamainternalmed.com. We document some unintended consequences of a hypertension control quality metric and financial incentive -- one that's widely used in US healthcare. In the overall population with hypertension there were almost no impacts, but..
JAMA Internal Medicine@jamainternalmed.com · 2mo agoA financial incentive for hypertension control increased guideline-adherent blood pressure remeasurement but did not improve overall control or health outcomes, highlighting potential unintended harms among patients with borderline hypertension. ja.ma/4e30pgh
Another clinically-oriented research letter from one of my grants, published in JGIM. In it, we find that low usage of diabetes preventive therapies (meds and weight management programs) among Vets with evidence of prediabetes. And 1/4 of our cohort develop diabetes! 1/2
Another striking study: RCT showing that a subsidy for produce did not improve outcomes such as HbA1c or ED visits (or BP or BMI). There may be other benefits, but if trying to improve these outcomes, providing such a subsidy isn't where you want to put your money in.
JAMA Internal Medicine@jamainternalmed.com · 4mo agoA produce prescription subsidy providing $80 per month did not improve glycemic control, blood pressure, body mass index, or health care use for patients with #Diabetes at risk for food insecurity. ja.ma/41pGgLt
An important paper showing that, for Veterans visiting an ED with a mental health condition, having delayed follow up causes decreased engagement with mental health care and increases mortality.
AEA Journals@aeajournals.bsky.social · 2y agoForthcoming in the AER: "How Do Mental Health Treatment Delays Impact Long Term Mortality?" by Sydney Costantini. www.aeaweb.org/articles?id=...
New letter in @jamanetworkopen.com! A clinically-oriented one examining the setting where meds affecting cognition (e.g., antipsychotics) are prescribed from. We find they are disproportionately prescribed from acute or post-acute settings (i.e., emergency room, hospital, SNF). 1/3
If you're buying plane tickets to ASHEcon '26, make sure you stay for our session (last of the conference) of 3 RDs studying heuristics, stigma, & guidelines. With @aschwartz.bsky.social, @vinisingh.bsky.social, @dzeltzer.bsky.social, and @mlbarnett.bsky.social! ashecon.confex.com/ashecon/2026...
Discontinuities In Clinical Practice: RD Evidence on Heuristics, Stigma, and Guideline Thresholds
ashecon.confex.com
Looks like the ASHEcon 2026 conference agenda has dropped. Warning: Don't take an early departure flight the last day, or you'll miss a session I'm really excited about. Not 1, not 2, but 3 (!) papers using RDs to understand physician decision-making. ashecon.confex.com/ashecon/2026...
Discontinuities In Clinical Practice: RD Evidence on Heuristics, Stigma, and Guideline Thresholds
ashecon.confex.com
Excited to post a new working paper with @instrumenthull.bsky.social and Michal Kolesár: arxiv.org/abs/2511.03572 Will post a thread on it soon, but if you're interested in judge/examiner designs, I think you'll find this guide very helpful!
Leniency Designs: An Operator's Manual
We develop a step-by-step guide to leniency (a.k.a. judge or examiner instrument) designs, drawing on recent econometric literatures. The unbiased jackknife instrumental variables estimator (UJIVE) is...
arxiv.org
Someone on a listserv I was on asked how to install SPSS on a server. I scoffed before realizing one day soon I'll be asking how to install Stata on a server and someone else will be rolling their eyes...
New paper w/ Brian McGarry, Ashvin Gandhi, and Drew Wilcock in @jamainternalmed.com! Hospitals are complaining across the US that patients are "stuck" waiting for rehab beds at nursing homes when they are medically stable and ready for discharge. What is going on?? jamanetwork.com/journals/jam...
🚨New paper🚨The emergency department (ED) is like a box of chocolates; you never know which doc you're gonna get. What happens when you get a doc that admits patients more often? Are you less likely to die? @stephencoussens and I explore this question in @JAMAInternalMed.🧵1/
PSA: many of your Israeli, Palestinian, and Jewish friends and colleagues are experiencing trauma and grief right now. Reach out to show you care about them. One human being to another. Politics aside. I’m not okay but I gain much strength and comfort from all of you who did so. Thank you.