Jeff Marr
jeffreydmarr.bsky.social
Jeff Marr
@jeffreydmarr.bsky.social
Health economist. Assistant Professor @brownpublichealth.bsky.social

https://jeffreydmarr.com/
Reposted by Jeff Marr
Recently accepted by #QJE, “Digital Distractions with Peer Influence: The Impact of Mobile App Usage on Academic and Labor Market Outcomes,” by Barwick, Chen, Fu, and Li: doi.org/10.1093/qje/...
Digital Distractions with Peer Influence: The Impact of Mobile App Usage on Academic and Labor Market Outcomes*
Abstract. Concerns about excessive mobile phone use among youth are mounting. We present estimates of both behavioral and contextual peer effects, along wi
doi.org
October 17, 2025 at 3:19 PM
Reposted by Jeff Marr
Few topics in health care policy can incite passions like insurer prior authorization. What do researchers know about this practice? I spoke with @dgorenstein.bsky.social and @lesliemwalker.bsky.social for the latest @tradeoffs.org podcast.

tradeoffs.org/2025/09/25/a...
A Closer Look at a Widely Despised Health Insurance Policy
Every year, millions of people’s medical care runs into the roadblock known as prior authorization, which requires a patient’s health insurer to sign off before chemotherapy, surgery or countless othe...
tradeoffs.org
September 25, 2025 at 2:20 PM
Reposted by Jeff Marr
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...
September 8, 2025 at 8:58 PM
Reposted by Jeff Marr
We think of AI as something that decreases costs and increases revenue. But _for whom_ does it make more $?

AI scribe companies promise that doctors will now get paid for everything they did in a visit. But where is that money coming from?

All of us.

More from me @statnews.com:
🖥️🩺
AI scribe companies promise to help doctors bill more. Who will pay the extra cost?
Like any conscientious health policy Ph.D. student, Paige Nong went to the doctor for her free annual well visit. But as she checked in, the person at the
www.statnews.com
August 20, 2025 at 2:46 PM
Reposted by Jeff Marr
Senators see a crackdown on Medicare Advantage upcoding as a potential way to generate savings.
Senate GOP eyes Medicare Advantage reforms as a way to pay for tax cuts
Senators see a crackdown on Medicare Advantage upcoding as a potential way to generate savings.
buff.ly
June 6, 2025 at 2:32 PM
Reposted by Jeff Marr
🚨 New paper alert, with @johnjhorton.bsky.social! Using an experiment run on a large online labor market, we provide evidence that providing employers access to an AI-written first draft of a job post harms the efficiency of the market.

emmawiles.github.io/storage/jobo...
March 24, 2025 at 5:00 PM
Reposted by Jeff Marr
It was a pleasure to write this piece for Health Affairs on risk adjustment in Medicare. Risk adjustment modifies payments to health plans or ACOs based on patient/beneficiary characteristics. Here's a very brief summary of my thoughts🧵

www.healthaffairs.org/doi/abs/10.1...
January 8, 2025 at 4:02 PM
Reposted by Jeff Marr
"I suspect that anyone who has been invoiced, paid a bill has been touched or has touched AI — certainly if it’s occurred within the last couple years."

There's renewed attention as to how claims are reviewed, approved, or denied. To what extent are AI and software algorithms saying yes or no?
AI has a growing role in processing health insurance claims - Marketplace
AI uses algorithms trained on types of patients and types of care. But these decisions often require nuance, which AI may not have.
mktplc.org
December 19, 2024 at 4:17 PM
Reposted by Jeff Marr
NEW: UnitedHealth Group is paying many of its own physician practices significantly more than it pays other doctor groups in the same markets for similar services, undermining competition and driving up costs for consumers and businesses. www.statnews.com/2024/11/25/u...
UnitedHealth pays its own physician groups considerably more than others, driving up consumer costs and its profits
First-of-its-kind data analysis finds UnitedHealth Group pays many of its own physician practices significantly more than the average it pays other doctors in the same markets
www.statnews.com
November 25, 2024 at 2:40 PM