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Martin Gaynor

@martingaynor.bsky.social
1.9K followers 461 following 412 posts

Economist at Carnegie Mellon focusing on organizations and incentives, markets, competition, and antitrust, and health care. Formerly at the Antitrust Division, DOJ and at the FTC. Daf Yomi learner. Antitrust, Economics, Talmud puns.

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Martin Gaynor @martingaynor.bsky.social · 09/09/2026
Repeat after me - what’s driving higher health insurance premiums? Health Care Spending. Insurer profits are part of the total, but a small part - spending on hospitals, doctors, etc. are what drive premium increases. Great work by Zack Cooper & colleagues. hcal.beehiiv.com/p/why-insura...
hcal.beehiiv.com
Why insurance premiums keep rising — a new tool and new research
Health care spending explains ~91% of premium growth since 2011.
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Martin Gaynor @martingaynor.bsky.social · 01/09/2026
🧵I know next to nothing about poetry, but his poem “The Peace of Wild Things” (reproduced below) resonates with me very deeply. It touches a chord inside and connects me with peace and comfort. www.nytimes.com/2026/08/31/u...
nytimes.com
Wendell Berry, Writer Who Extolled America’s Agrarian Past, Dies at 92
A Kentucky farmer, he railed against agribusiness and championed small family farms and the environment, winning widespread acclaim.
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Martin Gaynor @martingaynor.bsky.social · 31/07/2026
Downplay a movie The Good, the Bad, and the Mildly Unattractive A Fistful of Quarters The Slightly Soiled Dozen The Somewhat Impressive Seven
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Michael Clemens @mclem.org · 24/07/2026
It is sickening and illegal and poisonously anti-American to steal OUR tax dollars, mandated by our Congress for the public good, and pervert them into a plaything of authoritarian patronage. Flaying our public institutions is the opposite of Conservative and it harms all Americans.
nytimes.com
Trump Administration Admits Canceling Grants to States That Did Not Vote for Him (Gift Article)
Federal officials said in court documents that they halted billions of dollars in funding for energy projects to states “based solely” on whether they backed President Trump in the 2024 election.
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Jan Kabatek 💙💛 @jankabatek.com · 24/07/2026
📢We're hiring 📢 Short notice, but Melbourne Institute is looking for a Senior Research Fellow (level C) to work on applied industrial microeconomics research using Australian administrative datasets. Apply here: unimelb.wd105.myworkdayjobs.com/en-US/UOM_Ex...
unimelb.wd105.myworkdayjobs.com
Senior Research Fellow
Role type: Full Time, Continuing (Research Contingent) Faculty: Faculty of Business and Economics Department/ School: Melbourne Institute of Applied Economics and Social Research Salary: Level C - $15...
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Martin Gaynor @martingaynor.bsky.social · 24/07/2026
Nice paper by my colleague Seth Richards-Shubik and Ian McCarthy. Terrific combination of important topic, good data, and rigorous, appropriate, methods (including formal identification argument for search model parameters). Well done - we need more of this kind of research!
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Jay Shambaugh @jaycshambaugh.bsky.social · 24/07/2026
This is a terrible abuse of the 301 process. These tariffs should be tossed out, and once again, Congress should take steps to reassert its powers to set taexes. The President illegitimately raised taxes today. www.nytimes.com/2026/07/23/b...
nytimes.com
Trump Administration to Impose New Tariffs of Around 10% on Over 80 Nations
The administration announced new duties tied to countries’ imports of goods made with forced labor, replacing a global 10 percent tariff set to expire at midnight.
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Martin Gaynor @martingaynor.bsky.social · 21/07/2026
🧵Important new paper by Gaston Illanes and colleagues on the performance of merger simulation. Far from perfect at point prediction, but performs better at distinguishing high from low price change mergers than commonly used alternatives. www.nber.org/papers/w35473
nber.org
A Large-Scale Evaluation of Merger Simulations
Founded in 1920, the NBER is a private, non-profit, non-partisan organization dedicated to conducting economic research and to disseminating research findings among academics, public policy makers, an...
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Martin Gaynor @martingaynor.bsky.social · 20/07/2026
Important initial development. www.nytimes.com/2026/07/20/b...
nytimes.com
Judge Temporarily Pauses Paramount-Warner Bros. Deal
The delay is intended to give the court time to consider a lawsuit that argues the $111 billion merger violates antitrust laws.
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Shelly Lundberg @shellyjlundberg.bsky.social · 20/07/2026
I'm so grateful to the colleagues who have been willing to read my forthcoming book How Economics Discovered Women in advance (#4).
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Martin Gaynor @martingaynor.bsky.social · 05/07/2026
🧵Happy 250th America! My grandparents came here to escape relentless persecution & grinding poverty in Belarus, Ukraine & Hungary. They found freedom & opportunity & were able to build good lives for themselves, their children & their grandchildren. They loved America - as do I.
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Martin Gaynor @martingaynor.bsky.social · 29/06/2026
This strengthens the power of the President and weakens Congress. If you like this because you support Trump, consider the consequences when someone you don’t like is in the White House.
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Martin Gaynor @martingaynor.bsky.social · 29/06/2026
This is the end of federal “independent” agencies - they are no longer independent (& may no longer be bipartisan). I don’t have an opinion on the legal aspects of SCOTUS’s decision, but I think it’s bad for the functioning of these agencies & bad for the country. www.nytimes.com/live/2026/06...
nytimes.com
Live Updates: Supreme Court Expands Presidential Power Over Regulators, but Not the Fed
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Rep. Dan Frankel @repdanfrankel.com · 19/06/2026
On this day in 1865, slavery finally came to an end in the United States. Today, 161 years later, we celebrate abolition and rededicate ourselves to making sure that our country’s painful history is never forgotten or erased.
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Martin Gaynor @martingaynor.bsky.social · 15/06/2026
Read the story at the link. The Republican Party in Texas is actively promoting Islamophobia - for shame.
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Martin Gaynor @martingaynor.bsky.social · 15/06/2026
We’re all in this together. I’m very proud that the Pittsburgh Jewish Federation helped our Muslim neighbors. “The Jewish Federation of Greater Pittsburgh…helped the Attawheed Islamic Center in Carnegie, PA apply for a grant through the state security grant program. religionnews.com/2026/06/11/a...
religionnews.com
Mosques face increasing challenges to provide security amid growing anti-Muslim fervor
(RNS) — Muslim organizations suspect they are not afforded fair access to Nonprofit Security Grant Program administered through the Department of Homeland Security.
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Martin Gaynor @martingaynor.bsky.social · 15/06/2026
Not good. Certainly makes it look like this was a political decision and DOJ just mailed it in.
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Martin Gaynor @martingaynor.bsky.social · 09/06/2026
Two really excellent overviews of the key facts about horizontal (e.g. hospital-hospital) and vertical (e.g. insurer-provider) consolidation in health care by Zack Cooper & the Health Care Affordability Lab, Yale. cdn.prod.website-files.com/682cf1c62562... cdn.prod.website-files.com/682cf1c62562...
cdn.prod.website-files.com
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Emily Gee @emily-gee.bsky.social · 09/06/2026
The Econ team is hiring at the Center for American Progress! We're looking for a Policy Analyst with strong quantitative and writing skills; experience working with economic data; and an interest in compelling, evidence-based public policy arguments. [1/2] www.americanprogress.org/job/policy-a...
americanprogress.org
Policy Analyst, Economic Policy
American Progress is seeking a Policy Analyst to support its Economic Policy team’s efforts to promote an economy that works for all. The Policy Analyst position requires strong quantitative and writi...
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Martin Gaynor @martingaynor.bsky.social · 03/06/2026
Federal agencies that once honorably served the public are being compromised by the President’s lackey appointees to serve him and his cronies. www.wsj.com/politics/pol...
wsj.com
Inside Trump’s Takeover of the American Regulatory Machine
President dives into the weeds, shaping mergers and weighing in on psychedelic drugs, in a sharp departure from the past.
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Martin Gaynor @martingaynor.bsky.social · 31/05/2026
An amicus brief on economic issues in FTC v. Meta (fundamental flaws in market definition) and the impacts on appropriate enforcement. Signed on by Florian Ederer Steven Salop Nancy L. Rose Allan Collard-Wexler Larry White, and me.
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Martin Gaynor @martingaynor.bsky.social · 27/05/2026
Um ………….. what?!
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Martin Gaynor @martingaynor.bsky.social · 25/05/2026
Introduce yourself with 10 artists you’ve seen live. Loggins & Messina Led Zeppelin Grateful Dead Crosby, Stills & Nash The Tubes Stephen Stills The Who Simon & Garfunkel Peter Rowan Bruce Springsteen
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Martin Gaynor @martingaynor.bsky.social · 25/05/2026
On #MemorialDay we remember and honor the dedicated men and women of our armed services who made the ultimate sacrifice for their country. We owe them a debt that cannot be repaid.
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Martin Gaynor @martingaynor.bsky.social · 19/05/2026
I am heartsick over this. Once again, innocent, defenseless people are dead because of baseless hatred. Hate speech leads to hate crimes. Politicians, public figures, social media, have to stop exploiting fear of those who are different and promoting hatred. www.nytimes.com/2026/05/18/u...
nytimes.com
San Diego Mosque Attack Comes Amid Rising Reports of Islamophobia
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Martin Gaynor @martingaynor.bsky.social · 18/05/2026
Important new paper by Robert Metcalfe, Alexandre Sollaci & Chad Syverson. They show that proposed mergers that lead to greater market power will have smaller efficiencies & vice versa. This has important implications for enforcement agencies & courts in assessing mergers. www.nber.org/papers/w35221
nber.org
Proposed Mergers Where Efficiencies Are Needed Most Might Be the Least Likely to Deliver Them
Founded in 1920, the NBER is a private, non-profit, non-partisan organization dedicated to conducting economic research and to disseminating research findings among academics, public policy makers, an...
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Martin Gaynor @martingaynor.bsky.social · 10/05/2026
It was our good fortune at @cmuheinzcollege.bsky.social Carnegie Mellon University to have Distinguished Professor Jonathan Kanter address the graduates at commencement. You can watch his inspiring address here www.youtube.com/live/7CHSd4Z... at about the 57’ mark.
youtube.com
2026 Heinz College of Information Systems and Public Policy - Hooding, Diploma & Awards Ceremony
YouTube video by Heinz College at Carnegie Mellon University
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Martin Gaynor @martingaynor.bsky.social · 04/05/2026
“We are directing our anger at the part of the system that is most visible and frustrating (insurers’ restrictions on care) while ignoring the part of the health system that is most responsible for high costs and economic pain: hospital prices.” lnkd.in/eEiMjqtX www.nytimes.com/2026/05/04/o...
nytimes.com
Opinion | This Is the Biggest Culprit for High Health Care Spending
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Martin Gaynor @martingaynor.bsky.social · 04/05/2026
“We are directing our anger at the part of the system that is most visible and frustrating (insurers’ restrictions on care) while ignoring the part of the health system that is most responsible for high costs and economic pain: hospital prices.” www.nytimes.com/2026/05/04/o...
nytimes.com
Opinion | This Is the Biggest Culprit for High Health Care Spending
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Martin Gaynor @martingaynor.bsky.social · 03/05/2026
Slightly diminish a book Nineteen Eighty Three
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Martin Gaynor @martingaynor.bsky.social · 03/05/2026
Slightly diminish a book The Pretty Good Gatsby
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Martin Gaynor @martingaynor.bsky.social · 03/05/2026
Slightly diminish a book To Lightly Injure a Mockingbird
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Martin Gaynor @martingaynor.bsky.social · 03/05/2026
Slightly diminish a book Adequate Expectations
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Martin Gaynor @martingaynor.bsky.social · 01/05/2026
New paper with Amanda Starc on competition in health insurance markets out in Journal of Economic Perspectives (open access). pubs.aeaweb.org/doi/pdfplus/...
pubs.aeaweb.org
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Martin Gaynor @martingaynor.bsky.social · 20/04/2026
🧵It was a privilege to speak about antisemitism, hate, recovery and resilience, and spreading kindness and love with Andrea Wedner, Sharyn Stein, Jodi Kart, and Ranisa Rubin Davidson at Emmanuel Lutheran Church yesterday.
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Martin Gaynor @martingaynor.bsky.social · 15/04/2026
States sing a different tune than DOJ - jury hums along..
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Martin Gaynor @martingaynor.bsky.social · 15/04/2026
Very big deal. Jury Finds Live Nation Acts as a Monopoly in a Victory for States www.nytimes.com/2026/04/15/a...
nytimes.com
Jury Finds Live Nation Acts as a Monopoly in a Victory for States
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Martin Gaynor @martingaynor.bsky.social · 27/03/2026
🧵It was an honor to talk to the students at Dorseyville Middle School with Alan and Stanley Mallinger about our experiences of the synagogue attack here in Pittsburgh on 10.27.18, its aftermath, and combatting hate. They are such thoughtful, impressive young people with a wonderful teacher.
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Martin Gaynor @martingaynor.bsky.social · 24/03/2026
Evidence? Who needs evidence?!
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Martin Gaynor @martingaynor.bsky.social · 23/03/2026
Health care affordability is a big problem. Why? Consolidation and market power have a lot to do with it. www.nytimes.com/2026/03/23/u...
nytimes.com
When Voters Worry About ‘Affordability,’ Many Point to Health Care
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Martin Gaynor @martingaynor.bsky.social · 19/03/2026
100%. Thank you. It should be obvious that doing this is bigoted and nasty. Awful and disturbing that some think it’s OK, let alone that there’s even a question about it.
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Joel S. @joelhs.bsky.social · 17/03/2026
Joe Kent has given sympathetic interviews to Holocaust deniers. Even in his resignation from the National Counterterrorism Center over the Iran War, he finds a way to blame it on "Israel and its powerful American lobby" (read: Jews). Progressives *really* do not have to hand it to this guy.
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Martin Gaynor @martingaynor.bsky.social · 17/03/2026
Precisely.
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Martin Gaynor @martingaynor.bsky.social · 17/03/2026
These are the words I gave over at a recent Iftar gathering for Ramadan. I'm very grateful to our Muslim neighbors for inviting me and giving me the opportunity to connect and to be together with them at this significant time.
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Martin Gaynor @martingaynor.bsky.social · 17/03/2026
These are the words I gave over at a recent Iftar gathering for Ramadan. I'm very grateful to our Muslim neighbors for inviting me and giving me the opportunity to connect and to be together with them at this significant time.
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Martin Gaynor @martingaynor.bsky.social · 17/03/2026
Crowdsourcing for information - Are there bills in Congress to combat online hate that are worthy of support? I'm aware of the following - are there others? Thanks! S.3292 Platform Accountability & Transparency Act H.R. 5681 STOP HATE Act of 2025 H.Res. 963 - Condemning antisemitism in all its forms
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PennLDI @pennldi.bsky.social · 16/03/2026
How do insurer acquisitions of pharmacy benefit managers (PBMs) affect costs? New research by LDI Fellow Abby Alpert finds Medicare Part D insurers that continued working with rival insurers’ PBMs saw double-digit premium increases. bit.ly/4utFAli
ldi.upenn.edu
Insurer Acquisition of PBMs Raised Some Part D Premiums
LDI Fellow Abby Alpert found little evidence to support that insurers integrating with PBMs resulted in cost savings for Medicare Part D plan enrollees.
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Martin Gaynor @martingaynor.bsky.social · 15/03/2026
I was honored and moved to be invited to attend a Ramadan Iftar gathering and give over a few words, along with Reverend @liddybarlow.bsky.social. At a time of rising hate and division it was very meaningful and heartwarming to be welcomed and connect with our Muslim neighbors.
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Martin Gaynor @martingaynor.bsky.social · 12/03/2026
🧵Hate speech leads to hate crimes. The Republican Party, the Democratic Party, Everyone needs to call out, condemn, and marginalize those who are broadcasting, amplifying, and normalizing hate. This means Tucker Carlson, www.nytimes.com/2026/03/12/u...
nytimes.com
Attack on Synagogue Comes Amid Significant Rise in Antisemitic Incidents
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Martin Gaynor @martingaynor.bsky.social · 09/03/2026
New paper out with Amanda Starc on competition in health insurance markets, in particular on the complicated ways in which asymmetric information and competition interact (spoiler: things aren’t going so well). www.nber.org/papers/w34928
nber.org
Competition in Health Insurance Markets
Founded in 1920, the NBER is a private, non-profit, non-partisan organization dedicated to conducting economic research and to disseminating research findings among academics, public policy makers, an...
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