
Mark Meiselbach
@Mark_Meiselbach
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Assistant Professor studying health economics at @JohnsHopkins @JHSPH_HPM. Alumn of @JHSPH_HPM @TuftsUniversity.
Baltimore, MD
Joined October 2015
I thought health economics deserved its own... let me know what I missed! No shade meant for any of these papers, of course. #healthecon Original source of comic: https://t.co/zR64XKrkUU
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Through the rain and shine, Baltimore showed up and showed out for the 2025 @MarylandClassic. Congratulations to this year’s winners🔥
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Baltimore has achieved historic progress, driving down shootings and homicides to historic lows.
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The reality is Baltimore is safer today than it's been in 50 years. I spoke with @kateamaraWBAL yesterday about our record reductions in homicides and shootings.
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Best paper on measuring the impacts of an independent Fed is @td_econ, who has a very cool way of measuring Fed-White House interactions and their effects. Finds “increasing political pressure by half as much as Nixon, for six months, raises the price level more than 8%”
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Violent crime is at historic lows in Baltimore and cities across the country under the leadership of mayors who have brought together partners from law enforcement, the legal system, and communities to reduce violence. The president could learn a lot about leadership from them.
President Donald Trump again references Baltimore while speaking about crime. This time, it was during his announcement to place DC police under federal control and deploy the National Guard in the nation's capital. Full story: https://t.co/I2rYcQYr0T
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My @Briefing_Book piece on how OBBBA’s cuts to Marketplaces will hurt entrepreneurs, w/ Vani Agarwal, Helen Levy, Tom Buchmeuller https://t.co/4nvC4g1A4M Failure to extend enhanced premium subsidies will raise costs for small biz owners, forcing them to choose between invesments
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Responding to RFK Jr is like wack-a-mole but here's today's: vaccines do not increase autism by 1135% https://t.co/TELjunYNEc
parentdata.org
This is not true. Not the connection between vaccines and autism, not the claim of a cover-up, nothing. But beyond that, I want to unpack where this even
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95% of people who lost coverage when Arkansas instituted "work requirements" had jobs. You have to look at what policies *do*, not what they are *called*.
Rep. Andy Harris: "Look, if you're able-bodied without dependents and you choose not to work, well, you shouldn't be on a public welfare program. That's the bottom line ... you should be off the public dole. Yes, you will lose your Medicaid coverage. Get a job."
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Our nation is facing a deep fiscal crisis. Instead of responsibly addressing it, the Senate advanced one of the largest budget-busting pieces of legislation in American history. Our full statement on the Senate's passage of the One Big Beautiful Bill ⤵️ (1/)
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I am looking forward to future work on this project to explore enrollee retention and satisfaction in the plans and heterogeneous enrollment effects. We are grateful for funding from @Arnold_Ventures that supports this work!
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Interestingly, these plans look quite different from non-giveback plans. They tend to have higher cost-sharing and attract enrollees with much lower risk scores. But they offer other supplemental benefits at similar rates (e.g., nutrition benefits).
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We estimate that hundreds of millions are attributable to this benefit per month in 2024. Further, we find that the introduction of the giveback has a substantial effect on plan enrollment, with enrollment increasing >30% following the offer.
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In MA, enrollees still pay Part B premiums even when a plan is "free." This can be $100s per month. Increasingly, plans have been using rebate dollars to "give back" Part B premiums to enrollees in their plans. This is becoming common, with ~19% of plans offering this benefit.
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New paper out with @andrew_andersn, @Laura_J_Samuel, and @Kalit23 in @JAMAHealthForum on "Medicare Advantage Part B Premium Givebacks and Enrollment" @BSPH_HPM @JohnsHopkinsSPH @JHUNursing @JHU_HBHI More below. https://t.co/iBzDADJ6ix
jamanetwork.com
This study evaluates trends and expenditures in Medicare Advantage Part B premium givebacks and their association with plan enrollment.
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My very hot take: CBO is basically the most functional component of the legislative branch. The staff are super smart, non-partisan (their analysis annoys both Ds and Rs), and prolific--putting out incredibly helpful public materials and backup data. It's Congress's jewel.
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I am honored to be named a 2025 @aspenideas Health Fellow, joining a diverse group of leaders from around the world who are selected for their "innovative work, inspired accomplishments, and ability to transform ideas into action." https://t.co/ke9Rk60DKI
sph.brown.edu
For her policy-shaping research, Professor Yashaswini Singh will join health leaders from around the world in Colorado for the 2025 Aspen Ideas health conference.
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🎉 Congrats to PhD student @SarahClarkHend1 for winning a Best Student Poster Award at #ARM25! @AcademyHealth Her research explores how assets affect mental health among U.S. parents & non-parents. 🗓️ Catch her lightning talk: 🕧 Sat, June 7 | 12:30–1:45 PM
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The fake AI citations in the MAHA report are obviously embarrassing. But worse is what this says about how they are evaluating the real studies -- so much work in this space is just garbage correlation-not-causation. I cannot imagine they are thinking about evidence quality.
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SNAP work requirements caused immediate coverage losses but reversing them did not boost enrollment. https://t.co/BzaAWGlFu3
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Two other closing notes. First, while reporting of invalid diagnoses is part of why risk scores are higher in MA, more intensive coding of *valid* diagnoses is more important. Addressing coding intensity differences attributable to valid diagnoses requires tools beyond audits.
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