Thomas S. Dee
@tomdee.bsky.social
Barnett Family Professor, Stanford University 🌲
Senior Fellow, @hooverinstitution.bsky.social & @siepr.bsky.social
Research Associate, @nber.org
https://dee.stanford.edu/
#GoBirds 🦅
Senior Fellow, @hooverinstitution.bsky.social & @siepr.bsky.social
Research Associate, @nber.org
https://dee.stanford.edu/
#GoBirds 🦅
Our preregistered study of mental-health co-responders—now out in Nature Human Behaviour (doi.org/10.1038/s415...) —finds positive benefits in terms of significant reductions in psychiatric detentions and future mental-health crises relative to police-only responses.
November 17, 2025 at 4:06 PM
Our preregistered study of mental-health co-responders—now out in Nature Human Behaviour (doi.org/10.1038/s415...) —finds positive benefits in terms of significant reductions in psychiatric detentions and future mental-health crises relative to police-only responses.
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
I'm pleased my study of the initial raid's early impact on students is now out in @pnas.org
November 4, 2025 at 6:24 PM
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
I'm pleased my study of the initial raid's early impact on students is now out in @pnas.org
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.
October 24, 2025 at 4:52 PM
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.
🚨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.
Let's recognize them! Encourage them to apply for the Carnegie Award for Impact (cfdn.at/4o4gp58).
Applications due on November 10.
October 3, 2025 at 6:29 PM
🚨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.
Let's recognize them! Encourage them to apply for the Carnegie Award for Impact (cfdn.at/4o4gp58).
Applications due on November 10.
Thanks for flagging that. There seems to be some agreement on the role of post Great Recession spending declines?
July 11, 2025 at 4:25 PM
Thanks for flagging that. There seems to be some agreement on the role of post Great Recession spending declines?
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.
July 11, 2025 at 3:50 PM
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.
This provocative, data-infused essay by James Wyckoff — edworkingpapers.com/ai25-1197 — serves as a reminder that fully understanding the declines in student achievement requires us to look well before the COVID-19 pandemic.
May 31, 2025 at 2:52 PM
This provocative, data-infused essay by James Wyckoff — edworkingpapers.com/ai25-1197 — serves as a reminder that fully understanding the declines in student achievement requires us to look well before the COVID-19 pandemic.
I was so pleased to cross the Bay today and speak at the Berkeley Initiative for Transparency in the Social Sciences (www.bitss.org) about the need for (and feasibility of) adopting preregistration of studies making causal claims with observational data. #OpenScience
May 22, 2025 at 9:49 PM
I was so pleased to cross the Bay today and speak at the Berkeley Initiative for Transparency in the Social Sciences (www.bitss.org) about the need for (and feasibility of) adopting preregistration of studies making causal claims with observational data. #OpenScience
Need some good education news? Over the last decade, the number of students taking an AP Computer Science exam more than tripled and that was no accident.
In a new @pnas.org study, Daniela Ganelin & I find that roughly two-thirds of this growth can be attributed to the new AP CS Principles course.
In a new @pnas.org study, Daniela Ganelin & I find that roughly two-thirds of this growth can be attributed to the new AP CS Principles course.
April 11, 2025 at 12:05 PM
Need some good education news? Over the last decade, the number of students taking an AP Computer Science exam more than tripled and that was no accident.
In a new @pnas.org study, Daniela Ganelin & I find that roughly two-thirds of this growth can be attributed to the new AP CS Principles course.
In a new @pnas.org study, Daniela Ganelin & I find that roughly two-thirds of this growth can be attributed to the new AP CS Principles course.
I just shared this "continuous improvement" toolkit with someone who approached me about how to drive positive change in their school district.
This useful product, which is from a recently cancelled Regional Educational Laboratory, is an example of what this Administration is defunding.
This useful product, which is from a recently cancelled Regional Educational Laboratory, is an example of what this Administration is defunding.
March 21, 2025 at 5:43 PM
I just shared this "continuous improvement" toolkit with someone who approached me about how to drive positive change in their school district.
This useful product, which is from a recently cancelled Regional Educational Laboratory, is an example of what this Administration is defunding.
This useful product, which is from a recently cancelled Regional Educational Laboratory, is an example of what this Administration is defunding.
SF is really something else…
February 26, 2025 at 7:55 PM
SF is really something else…
I just walked by the new @stanfordgse.bsky.social building and saw the iconic red roof going into place!
I'm also impressed by these workers standing on a pitched roof while casually playing pitch & catch with these heavy tiles.
I'm also impressed by these workers standing on a pitched roof while casually playing pitch & catch with these heavy tiles.
February 18, 2025 at 9:52 PM
I just walked by the new @stanfordgse.bsky.social building and saw the iconic red roof going into place!
I'm also impressed by these workers standing on a pitched roof while casually playing pitch & catch with these heavy tiles.
I'm also impressed by these workers standing on a pitched roof while casually playing pitch & catch with these heavy tiles.
The National Network of Education Research-Practice Partnerships (NNERPP) @rpp-network.bsky.social is on Bluesky. And I'm glad to be their first follow. #EduSky
February 18, 2025 at 1:15 AM
The National Network of Education Research-Practice Partnerships (NNERPP) @rpp-network.bsky.social is on Bluesky. And I'm glad to be their first follow. #EduSky
Today's NAEP results—& the apparent role of chronic absenteeism—are unsurprising to any close observer
What's curious to me is this evidence-based sense of calamity doesn't really shape broader public sentiment. In fact, satisfaction is rebounding!👇
Is it crisis fatigue? Biases in info & judgment?
What's curious to me is this evidence-based sense of calamity doesn't really shape broader public sentiment. In fact, satisfaction is rebounding!👇
Is it crisis fatigue? Biases in info & judgment?
January 29, 2025 at 4:10 PM
Today's NAEP results—& the apparent role of chronic absenteeism—are unsurprising to any close observer
What's curious to me is this evidence-based sense of calamity doesn't really shape broader public sentiment. In fact, satisfaction is rebounding!👇
Is it crisis fatigue? Biases in info & judgment?
What's curious to me is this evidence-based sense of calamity doesn't really shape broader public sentiment. In fact, satisfaction is rebounding!👇
Is it crisis fatigue? Biases in info & judgment?
Here's the NCES data. But a clarification on my part: the gap growth was in grade-4 math. At grade 8 there were declines at both the 90th & 10th percentiles.
December 4, 2024 at 3:13 PM
Here's the NCES data. But a clarification on my part: the gap growth was in grade-4 math. At grade 8 there were declines at both the 90th & 10th percentiles.
And, second, the distribution of test-statistics in some QEDs shows a particularly suspicious distribution of missingness just before statistical significance and bunching at statistical significance (Brodeur et al., 2022)
November 21, 2024 at 12:46 PM
And, second, the distribution of test-statistics in some QEDs shows a particularly suspicious distribution of missingness just before statistical significance and bunching at statistical significance (Brodeur et al., 2022)
Multiple “many analyst” studies show a wide variance in results when different research teams answer the same question with the same data.
For example, what did 73 different research teams conclude about the impact of immigration on public support for social policies (Breznau et al., 2022, PNAS)?
😳
For example, what did 73 different research teams conclude about the impact of immigration on public support for social policies (Breznau et al., 2022, PNAS)?
😳
November 21, 2024 at 12:46 PM
Multiple “many analyst” studies show a wide variance in results when different research teams answer the same question with the same data.
For example, what did 73 different research teams conclude about the impact of immigration on public support for social policies (Breznau et al., 2022, PNAS)?
😳
For example, what did 73 different research teams conclude about the impact of immigration on public support for social policies (Breznau et al., 2022, PNAS)?
😳
I regret the loss of what I once valued about Twitter (e.g., professional hive mind, democratized voice, organic humor).
But may I offer a more optimistic Truman Show gif for what might be next? #BlueSky
But may I offer a more optimistic Truman Show gif for what might be next? #BlueSky
November 17, 2024 at 6:29 PM
I regret the loss of what I once valued about Twitter (e.g., professional hive mind, democratized voice, organic humor).
But may I offer a more optimistic Truman Show gif for what might be next? #BlueSky
But may I offer a more optimistic Truman Show gif for what might be next? #BlueSky
Sadly apt to re-up evidence on immigration enforcement's impact on students & schools
Dee, T. & Murphy, M. (2020). Vanished classmates: The effects of local immigration enforcement on student enrollment. American Educational Research Journal 57(2), 694-727.
Ungated files.eric.ed.gov/fulltext/EJ1...
Dee, T. & Murphy, M. (2020). Vanished classmates: The effects of local immigration enforcement on student enrollment. American Educational Research Journal 57(2), 694-727.
Ungated files.eric.ed.gov/fulltext/EJ1...
November 8, 2024 at 10:59 PM
Sadly apt to re-up evidence on immigration enforcement's impact on students & schools
Dee, T. & Murphy, M. (2020). Vanished classmates: The effects of local immigration enforcement on student enrollment. American Educational Research Journal 57(2), 694-727.
Ungated files.eric.ed.gov/fulltext/EJ1...
Dee, T. & Murphy, M. (2020). Vanished classmates: The effects of local immigration enforcement on student enrollment. American Educational Research Journal 57(2), 694-727.
Ungated files.eric.ed.gov/fulltext/EJ1...
Let me get a brief distraction by knocking out today's Wordle...
November 6, 2024 at 2:16 PM
Let me get a brief distraction by knocking out today's Wordle...
Join us next Friday for an online seminar hosted by the Los Angeles Education Research Institute where Dr. Huffaker & I will discuss instructionally supported Algebra detracking (edworkingpapers.com/ai24-986) with our practitioner partners. #edusky
Register at: laeri.luskin.ucla.edu/laeri-resear...
Register at: laeri.luskin.ucla.edu/laeri-resear...
October 30, 2024 at 5:53 PM
Join us next Friday for an online seminar hosted by the Los Angeles Education Research Institute where Dr. Huffaker & I will discuss instructionally supported Algebra detracking (edworkingpapers.com/ai24-986) with our practitioner partners. #edusky
Register at: laeri.luskin.ucla.edu/laeri-resear...
Register at: laeri.luskin.ucla.edu/laeri-resear...
One of the many benefits of having family and friends visit is getting out to see more of California's natural beauty. This is a view of Gray Whale Cove (aka Devil's Slide) today from a trail in McNee Ranch State Park.
September 19, 2024 at 3:03 AM
One of the many benefits of having family and friends visit is getting out to see more of California's natural beauty. This is a view of Gray Whale Cove (aka Devil's Slide) today from a trail in McNee Ranch State Park.
"The past isn't dead. It's not even past."
October 16, 2023 at 1:03 AM
"The past isn't dead. It's not even past."
Small but growing & consistent evidence that the shocking growth in chronic absenteeism continued into the 2022-23 school year. From Chalkbeat's Kayln Belsha:
www.chalkbeat.org/2023/9/28/23...
www.chalkbeat.org/2023/9/28/23...
September 29, 2023 at 1:22 AM
Small but growing & consistent evidence that the shocking growth in chronic absenteeism continued into the 2022-23 school year. From Chalkbeat's Kayln Belsha:
www.chalkbeat.org/2023/9/28/23...
www.chalkbeat.org/2023/9/28/23...