Research Director at the Regulation, Evaluation, and Governance Lab (reglab.stanford.edu), Executive Director of City Systems (city.systems).
Joined August 2010
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223 Photos and videos
Pinned Tweet
Mar 17
Let's say you're trying to understand racial health disparities in the U.S. Does it matter which source of administrative race/ethnicity information you use? We analyzed a dataset of 5M patients with linked electronic health records and Census Bureau microdata to find out. 🧵👇
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Mar 17
Let's say you're trying to understand racial health disparities in the U.S. Does it matter which source of administrative race/ethnicity information you use? We analyzed a dataset of 5M patients with linked electronic health records and Census Bureau microdata to find out. 🧵👇
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Mar 17
9/ It was also a personal honor to be able to do this work as a Census sworn researcher, and to work with awesome collaborators within a secure research environment at the U.S. Census Bureau. (This study survived DOGE and two government shutdowns! #iykyk)
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Mar 17
10/ Check out the full paper, “Evaluating the impact of discordant and missing demographic information on population health assessments using linked electronic health records and Census Bureau microdata”, at journals.plos.org/digitalhea…, and our other work at reglab.stanford.edu
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15 Nov 2025
The EPA receives thousands of tips annually from the public about environmental violations. 80% of them shouldn’t even be going to the EPA, and the rest often get sent to the wrong division. We’ve built an LLM-based system to assist with tip routing. aclanthology.org/2025.emnlp-…
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15 Nov 2025
We developed a two-stage LLM pipeline by fine-tuning models on these tips. Stage 1 filters out tips that aren’t under the EPA’s jurisdiction, and Stage 2 routes remaining tips to the Civil or Criminal Division. We achieve 82.4% accuracy (compared to 31.8% in the current system).
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15 Nov 2025
At a time of increased focus on "government efficiency", this #EMNLP2025 accepted paper shows how LLMs can empower civil servants rather than replace them, keeping humans in the loop while reducing time spent on redundant and menial tasks. See more at reglab.stanford.edu!
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Derek Ouyang retweeted
11 Nov 2025
✨ Very overdue update:
I'll be starting as an Assistant Professor in CS at University of Minnesota, Twin Cities, Fall 2026. I will be recruiting PhD students!!
Please help me spread the word! [Thread] 1/n
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11 Sep 2025
Thanks @KelseyTuoc for referencing our ADU study! Couldn't have said it better: "I don’t think we need better enforcement that would prevent this housing from getting built — we need fewer rules for people building much-needed housing!" RegLab is working on this with cities!
3 Sep 2025
I wrote for the Argument today about all the ways our society is set up to reward cheating: strict rules, not really enforced, because we lack the will either to enforce them or to change them. theargumentmag.com/p/the-hon…
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8 Apr 2025
The term "Asian American", developed in the 60s for political purposes, can unfortunately mask significant within-group disparities. We just published a dataset code in Nature Scientific Data to assist with Asian disaggregation for equity assessments. nature.com/articles/s41597-0…
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8 Apr 2025
Using the same healthcare validation dataset, we also demonstrate that our technique can reasonably recover underlying health disparities. We're talking about 10 percentage point differences between, say, Japanese and Chinese Americans on type 2 diabetes diagnoses.
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8 Apr 2025
There's a lot more we get into in the paper about why this matters to research and policymaking, so please read share with anyone who's in this space. I must admit, when we started this work, we didn't anticipate that enabling disparity assessments would become SO relevant.
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