Thomas S. Dee

@tomdee.bsky.social

1.8K followers 1K following 120 posts

Barnett Family Professor, Stanford University 🌲
Senior Fellow, @hooverinstitution.bsky.social & @siepr.bsky.social
Research Associate, @nber.org
https://dee.stanford.edu/
#GoBirds 🦅

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Thomas S. Dee is an American economist and the Barnett Family Professor of Education at Stanford University, where he also directs the John W. Gardner Center for Youth and Their Communities. .. more

Education 68%

Business 6%

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Thomas S. Dee @tomdee.bsky.social · Nov 21

At today's #2024APPAM Rossi Award Lecture, I’ll argue the substantial impact of open-science practices has been far too narrow.

It’s time to adapt & adopt open-science practices—especially
preregistration—for quasi-experimental designs (QEDs).

#EconSky #EduSky #APPAM2024 @appam.bsky.social

🧵…

Thomas S. Dee @tomdee.bsky.social · 6d

Open access is available here: doi.org/10.1073/pnas....

PNAS

Proceedings of the National Academy of Sciences (PNAS), a peer reviewed journal of the National Academy of Sciences (NAS) - an authoritative source of high-impact, original research that broadly spans...

doi.org

Reposted by Aaron Sojourner, Rita Hamad, Matthew A. Kraft

Thomas S. Dee @tomdee.bsky.social · 6d

The aggressive immigration raids we now see across the nation began 10 months ago in California's Central Valley. Their impact on children, families, and communities is an important & active area of research

I'm pleased my study of the initial raid's early impact on students is now out in @pnas.org

Thomas S. Dee @tomdee.bsky.social · 14d

👍 but I think it's far less difficult (and constraining of discovery) than some people think. For example, it's simple enough to preregister a "decision tree" of research designs to be informed by robustness checks.

The key thing is to create transparency to support sense-making of study results

Reposted by Joshua Goodman, Todd Pugatch, Jake Anders

Thomas S. Dee @tomdee.bsky.social · 14d

Empirical evidence and conceptual reasoning suggest quasi-experimental studies—the most common form of studies making causal claims—have a "p-hacking" problem.

My essay on this and the case for adapting & adopting QED preregistration is now published in Evaluation Review.

doi.org/10.1177/0193...

Sage Journals: Discover world-class research

Subscription and open access journals from Sage, the world's leading independent academic publisher.

doi.org

Thomas S. Dee @tomdee.bsky.social · 17d

Such a warm, engaging, and informative visit! My thanks to the @annenberginstitute.bsky.social at Brown University for inviting me to give the Annenberg 2025 Distinguished Lecture.

Thomas S. Dee @tomdee.bsky.social · 25d

Not sure but always happy to connect! I plan to stress some of the aligned ideas in this recent @edweek.org #K12BigIdeas essay👇 and your recent book! (www.amazon.com/rethinking-c...).

www.edweek.org/leadership/o...

High Quality Research Rarely Informs Classroom Practice. Why? (Opinion)

The connection between education research, policy, and practice is broken. Here’s what it would take to fix it.

www.edweek.org

Thomas S. Dee @tomdee.bsky.social · 25d

I'm honored to give the Annenberg 2025 Distinguished Lecture next week and looking forward to being in conversation with this outstanding community.

Annenberg Institute @annenberginstitute.bsky.social · 25d

Join us for the Annenberg 2025 Lecture with @tomdee.bsky.social, Barnett Family Professor at Stanford University, on understanding and addressing chronic absenteeism.

🗓️ October 22, 4:00 PM EDT 📍 MacMillan Hall, Room 117, Brown University.

Register: buff.ly/U8JtaAO

Reposted by Thomas S. Dee

Annenberg Institute @annenberginstitute.bsky.social · 25d

Thomas S. Dee @tomdee.bsky.social · Oct 6

Know any aspiring PhD students interested in quant studies in education? Please direct them to our programs in ed policy, econ of ed, or ed data science! I hope to welcome an energetic & ambitious student to join me in our new building 🌴☀️
Applications due November 17
ed.stanford.edu/admissions/a...

Apply for Admission | Stanford Graduate School of Education

As you prepare your application, familiarize yourself with the admission process and timeline for your desired program below. Note that the application for 2026-2027 entry is not yet available.

ed.stanford.edu

Reposted by Adam Gamoran

Thomas S. Dee @tomdee.bsky.social · Oct 3

🚨Do you know a school, system, or network doing amazing work in support of student success in high school, particularly through a continuous-improvement approach?

Let's recognize them! Encourage them to apply for the Carnegie Award for Impact (cfdn.at/4o4gp58).
Applications due on November 10.

Reposted by Thomas S. Dee, Ken Caldeira, Edgar Morgenroth , and 6 more Thomas S. Dee, Ken Caldeira, Edgar Morgenroth, Alan Richardson, Scott A. Imberman, Iñaki Aldasoro, Christina Pagel, Timothy D. McBride, Peter Jacobs

Axios @axios.com · Sep 19

JUST IN: Bureau of Labor Statistics postpones key inflation data report

Bureau of Labor Statistics postpones key data report with no explanation

There is heightened concern about the future of key government statistics, including politicization and accuracy.

trib.al

Reposted by Lesley Bartlett

Thomas S. Dee @tomdee.bsky.social · Sep 12

It's gratifying to see my recent immigration-raid research actually being used.
wapo.st/42mWdTn

Teachers sue over Trump's immigration crackdown, saying students are staying home

Labor unions representing educators and school employees are suing President Donald Trump’s administration over its immigration crackdown

wapo.st

Reposted by Thomas S. Dee

Margaret Thornton @maggiethornton.bsky.social · Sep 11

"Educators should also understand the limitations of research evidence. Rigorous impact evaluations...can only tell us what has worked someplace at some time—not what will work universally for educators facing specific challenges." - @tomdee.bsky.social
www.edweek.org/leadership/o...

High Quality Research Rarely Informs Classroom Practice. Why? (Opinion)

The connection between education research, policy, and practice is broken. Here’s what it would take to fix it.

www.edweek.org

Reposted by Thomas S. Dee

Dan Willingham @dtwuva.bsky.social · Sep 11

Why aren't practices based on research implemented in schools? @tomdee.bsky.social has insights, and ideas for change. www.edweek.org/leadership/o...

High Quality Research Rarely Informs Classroom Practice. Why? (Opinion)

The connection between education research, policy, and practice is broken. Here’s what it would take to fix it.

www.edweek.org

Reposted by Thomas S. Dee

Cara Jackson @carajackson.bsky.social · Sep 9

"...embrace opportunities for quick and meaningful wins. These are the common-sense education initiatives that share three critical features: evidentiary support, low financial costs, and scalability." - @tomdee.bsky.social www.edweek.org/leadership/o...

High Quality Research Rarely Informs Classroom Practice. Why? (Opinion)

The connection between education research, policy, and practice is broken. Here’s what it would take to fix it.

www.edweek.org

Thomas S. Dee @tomdee.bsky.social · Sep 8

Just out in @edweek.org's #K12BigIdeas, I criticize the quality & connectedness of education research, policy, & practice and discuss what it would take to do better.

www.edweek.org/leadership/o...

High Quality Research Rarely Informs Classroom Practice. Why? (Opinion)

The connection between education research, policy, and practice is broken. Here’s what it would take to fix it.

www.edweek.org

Reposted by Thomas S. Dee

Thomas S. Dee @tomdee.bsky.social · Nov 21

👍 Christensen & Miguel (2018) make the verification critique too.

My rejoinder is
- Evidence & commentary suggests the vast majority of p-hacking is due to motivated reasoning+HARKing, not fraud
- It lets perfect be the enemy of "better"
- It holds QEDs to an anti-fraud standard not all RCTs meet

Reposted by Thomas S. Dee

Greg King @gregoryjkingphd.bsky.social · Dec 4

Reflecting on these data make me wonder about the intermix between policy and EdTech product needed to drive improvements.

Specifically, what will it take seriously build the balance of private innovation, public and private investment, and needs of schools to meaningfully change this trajectory.

Thomas S. Dee @tomdee.bsky.social · Dec 4

The just-released TIMSS data put the United States' ongoing academic-recovery failures in an unflattering international context.
#EduSky #EconSky

www.the74million.org/article/four...

Four Insights into U.S. Students’ Drop in Math & Science on International Test

Tuesday’s release of TIMSS scores shows that American students fell behind their international peers during the pandemic.

www.the74million.org

Reposted by Thomas S. Dee

Jill Barshay @jillbarshay.bsky.social · Dec 9

A new survey of college admissions officers demonstrates the enduring importance of calculus on the h.s. transcript. Signs that attitudes are shifting, but test-optional admissions may increase the weighting of calc. hechingerreport.org/proof-points...

Is calculus an addiction that college admissions officers can't shake?

A new survey shows how the subject has become a proxy for academic rigor

hechingerreport.org

Reposted by Thomas S. Dee

Thomas S. Dee @tomdee.bsky.social · Dec 10

Before the misPIACCery (?) goes too far, I wanted to note:

"Comparisons of 2023 results with 2012/14 and 2017 PIAAC assessments need to be made with caution due to differences in the assessments and scoring methodology."

Reposted by Thomas S. Dee

Jill Barshay @jillbarshay.bsky.social · Dec 17

You may have seen the headlines about the horrid math skills of U.S. children, but a few of the details in the 2023 TIMSS international test score report are fascinating. Let's dig in with pictures... 🧵 (1/5) hechingerreport.org/proof-points...

6 observations from a devastating international math test

2023 TIMSS results show fewer U.S. students in the middle, a re-emergent gender gap and a silver lining

hechingerreport.org

Reposted by Thomas S. Dee

Dan McQuade @dhm.bsky.social · Jan 25

No way the Eagles lose after this

Reposted by Thomas S. Dee

Kate Harris-Walls @k8harris.bsky.social · Feb 20

🎓✨ Surviving (and Thriving) in the Hidden Curriculum of Graduate School

Join @tomdee.bsky.social on Thursday, the 27th from 1-2 PM ET for insights on navigating the unspoken rules of grad school, followed by a broader Q&A session on navigating the #AEFP conference.

Link: tinyurl.com/mpewfrsr

Thomas S. Dee @tomdee.bsky.social · Jul 11

Thanks for flagging that. There seems to be some agreement on the role of post Great Recession spending declines?

Thomas S. Dee @tomdee.bsky.social · Jul 11

I'm curious how people view hypotheses about these achievement declines. I incline towards (1) the failure to refine & sustain school accountability & (2) the rise of smart phones & social media. But that's conjectural without better evidence.

Reposted by Thomas S. Dee

Eric Dearing @ericdearing.bsky.social · Jul 10

Have we given too much "credit" to the pandemic for learning losses? Almost 50% of the post-pandemic decline in achievement on 8th grade NAEP was to be expected (without the pandemic!), simply using the same rate of declining achievement that began unfolding starting in 2013!

Reposted by Caroline Krafft, Susan Patrick

Thomas S. Dee @tomdee.bsky.social · Jun 16

The current wave of federal immigration raids began in January with a “rogue” operation in California’s Central Valley.

My new study finds these raids increased school absences by 22%—a leading indicator of the resulting family stress & lost learning opportunities👇

www.nytimes.com/2025/06/16/u...

Immigration Raids Add to Absence Crisis for Schools

www.nytimes.com

Reposted by Thomas S. Dee

EdSource @edsource.org · Jun 20

Immigration raids in January and February increased absences by 22% in five school districts, according to a newly released Stanford study.

‘There was a lot of fear’: Central Valley immigration raids drive up absences in schools, study finds

Immigration raids in January and February increased absences by 22% in five school districts, according to a newly released Stanford study.

edsource.org

Reposted by Thomas S. Dee

SIEPR @siepr.bsky.social · Jun 17

🚨New research from SIEPR Senior Fellow @tomdee.bsky.social finds that student absences rose amid intensified immigration enforcement, indicating lost learning opportunities. 👇
bit.ly/3I1vGDJ

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