@jaypgreenei
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Director of Research, Do No Harm. Senior Fellow, Defense of Freedom Institute. All opinions are my own.
Joined October 2010
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Jay P. Greene retweeted
Reminder: US schools serving low-income and non-white communities get more money per pupil not less and have for a long time
Jay P. Greene retweeted
I worked on this for YEARS and am finally able to share it:
One of the biggest obstacles for Jewish people fighting antisemitism has been a problem recognized by countless scholars over many years: Jews are notoriously difficult to categorize into a single group or even 2 or 3 clearly identified protected classes under the law. Worse still, many Jews themselves don’t know how exactly how to describe their Jewishness or how they fit in. This has presented a serious and frustrating problem both in every day life (often causing internal strife between Jewish groups themselves), and in courtrooms across the country where dismissal of antisemitism-based cases have too often hinged on courts misunderstanding who we are as a people.
We know that Jews are not a monolith. But what are we? Who are we?
In my piece just published in @Commentary Magazine, I present what I consider the seminal work of my life. I ask, “who are the Jewish people, really?”
What took me many years to discover is actually remarkably obvious when you see it. It is a universal truth that simply needed to be discovered and explained. I introduce the reality that Jews fit quite neatly into 5 categories of people and present my P.R.I.Z.E. framework: the first-ever mapping of the five Authentic dimensions of Jewish identity.
I hope you will consider reading it, sharing it, and debating it. I have given some “pre-talks” about P.R.I.Z.E. leading up to this paper and the single most frequent and gratifying comment I receive afterwards has been, “thank you so much-- I have known I am Jewish all my life, but this is the first time I know how to explain it.” Gets me every time.
commentary.org/articles/jeff…
Jay P. Greene retweeted
Just picked up a copy of today’s @nypost and saw my piece appears alongside essays with @karol @jaypgreene and @PeerReReview. I’ve outkicked my coverage again.
Jay P. Greene retweeted
9/
We present three models in our report that all produce null findings. We tinkered with these and other model specifications. Not a single one produced a significant result. It’s so clearly null that no amount of manipulation is going to produce a significant effect.
Jay P. Greene retweeted
10/
Our analysis is not the last word. Other researchers can and should employ different models and incorporate new data as it becomes available.
Jay P. Greene retweeted
1/
“gender affirming” medical interventions are permanent & biologically harmful. Ethically, the only possible justification to subject kids to medical transition is the threat that denying these interventions risks even greater harm. And that’s precisely what activists argue. 🧵
New study by @PeerReReview and me on whether state restrictions on puberty blockers, hormones, and surgeries for minors increased the rate of teen suicides. We used multiple analytic techniques on CDC data and find no evidence of an increase. donoharmmedicine.org/2026/09…
Jay P. Greene retweeted
The self-harm narrative regarding trans-identifying youth has long been used to justify access to "gender-affirming care."
However, is this actually true?
A new study finds that restricting these treatments for minors isn't associated with an increase in self-harm. 🚨
Find out why 👉
New study by @PeerReReview and me on whether state restrictions on puberty blockers, hormones, and surgeries for minors increased the rate of teen suicides. We used multiple analytic techniques on CDC data and find no evidence of an increase. donoharmmedicine.org/2026/09…
Jay P. Greene retweeted
"Published research by medical students continues to proliferate despite concerns about the quality of the work, according to a new report.
'Why Johnny Can’t Stop Writing: The Boom in Low-Impact, Politicized Medical Student Research,' authored by Do No Harm’s Jay Greene, highlights the proliferation of low-quality medical student research in the past 20 years. The researcher offered potential solutions in original comments sent to The College Fix.
Greene found that in the early 2000s, fewer than 12 publications listed students as authors or co-authors, but in the 2020s, more than 700 publications could claim medical student authorship... "
Read the full article from The College Fix linked in the comments 🔗
Jay P. Greene retweeted
We ran the data on trans teen suicide panic — and found the claims are misleading: “The suicide threat isn’t true.”
nypost.com/2026/09/17/opinio…
Lies, Damned Lies, and Push Polls nitter.cf/i/broadcasts/1pKkOXmDr…
Jay P. Greene retweeted
A lot of what does get published is woke slop, as @jaypgreene discovered.
The push to have students engage in research is a real mistake.
realclearpolitics.com/articl…
This pattern started with DEI staff as @james_d_paul and I observed and has now trickled down to students. heritage.org/education/repor…
Incoming Yale freshmen are less critical of China than Israel.
Asked about their views on the two countries, 62.8% said they are critical of Israel, while only 35.4% said they are critical of China.
8% said they support Israel and 13.5% said they support China.
14.2% said they are neutral on Israel compared to 35.1% on China.
Jay P. Greene retweeted
Fairfax would do well to read @EDSecMcMahon’s DCL & note the moral clarity it stresses.
Schools should remind students of the American heroes; that “their sacrifice thwarted the terrorists’ evil purpose,
saving the lives of countless American strangers.” ed.gov/media/document/call-c…
Fairfax County's new 9/11 teaching guide devotes roughly half its content to creating "safe spaces for Muslim and Middle Eastern students." while mentioning military families just three times and first responders once.
The six-page document, obtained by Fox News Digital's @AsraNomani, contains 30 references to Islam, "anti-Muslim racism," and "Islamophobic rhetoric." It explicitly tells teachers not to "associate the 9/11 attacks with Islam or Muslims" and not to "center the extremists or the acts of the extremists." Only about 15% of the guide actually spells out specific 9/11 instruction.
Retired Vice Admiral Lou Crenshaw, who was inside the Pentagon when al-Qaeda terrorists flew a plane into the building, ripped the guide for failing to convey "the evilness of what actually happened," calling it a sanitized, "vanilla" approach that shaves the facts until students can't figure out what they're learning about.
Falling Tower of PISA! nitter.cf/i/broadcasts/1AKEmvMNE…
Jay P. Greene retweeted
Nicholas Kristof: “Research suggests” diverse teams outperform groups of the best individual problem-solvers.
A new review finds scant evidence for that claim.
Turns out Kristof’s diversity science is about as credible as his Israeli rape-dog story.
link.springer.com/article/10…
Jay P. Greene retweeted
'Through the power of not testing our lower-performing students, we've become a top-10 education system!'
Strangely, this is being chalked up to hard work. I guess it's hard work messing up the sampling.
New PISA data out- and a huge success story. England is now a top-10 education system in the world. Outside of Asia, one of the highest.
New PISA 2025 results:
Science: 8th in the world, up from 13th
Reading: 9th, up from 13th
Maths: 10th, up from 11th.
While much of the OECD has gone backwards, England has has held its ground while most of the world has gone backwards. Huge achievement by school staff.
Jay P. Greene retweeted
The Phoenix Principles is coming soon to your favorite bookstore!
With chapters by @melissamoschell @MBeienburg Rachel Cambre, @MTMehan @mark_bauerlein @rpondiscio & Yuval Levin plus a foreword by @LarryArnn, intro by @shulsie & yours truly, and conclusion by @RyanTAnd.
Jay P. Greene retweeted
Many such cases. DEI is bad for everyone, but it is especially bad for the groups it is supported to rescue.
This is an absolute must-read about how a myopic fixation on narrowing racial inequities to the exclusion of all other goals in education in Seattle Public Schools hurt all students, worsened inequities, and hastened a flight for private schools.
open.substack.com/pub/educat…