Johan Ugander
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jugander.bsky.social
Johan Ugander
@jugander.bsky.social
Associate Professor, Yale Statistics & Data Science. Social networks, social and behavioral data, causal inference, mountains. https://jugander.github.io/
Fair! I've actually heard lots of mixed feels. To me its pros and cons, but I tend to tune in.
January 10, 2026 at 9:58 PM
Interesting, will check out! IIRC the main thread of the podcast critique is not that the results are wrong, but more a criticism of the lack of impactful translation to policy. Episode 2 talks a lot of government "nudge units". Been a while since I listened tho.
January 10, 2026 at 9:56 PM
If you enjoy salty podcasts, If Books Could Kill has a two-parter on Thaler & Sunstein's Nudge. The first episode covers organ donation (and IIRC a bit on retirement) and other early work. Recommend both episodes (and the rest of the podcast too). Available wherever you get your podcasts.
January 10, 2026 at 9:47 PM
Less glib: my ability to do research-by-graduate-student leverages skills i've built up over a decade, e.g., knowing how to "unit test" student output, considering edge cases, etc. Things like: why doesn't the plot start at y=0? Etc. Processing the output of vibe-code feels very similar. 2/2
January 8, 2026 at 12:24 PM
Here are the stats for my own account. (Separately: used this script rewrite to test drive claude code for the first time, amazing.)
January 8, 2026 at 11:41 AM
This is a cool/simple/elegant glimpse. And thanks for sharing the script! I think the lurker percentage is pretty comparable, but I don't have hard numbers to point to for (any vintage of) any other network.
January 8, 2026 at 10:45 AM
(Ignore the spurious "Original" string at the bottom; that's just a bad crop by me, I was comparing the modified and original tex tables in the same tex file)
December 18, 2025 at 3:23 PM
With a disclaimer that this was just 30 minutes of hacking, generously aided by AI coding, so I might have messed up the code tweaks. But I wanted to report back and also give huge kudos for the clean replication code. 3/3
December 18, 2025 at 3:22 PM
Your code repo is amazingly clean, so I was able to do straightforward code modifications and replicate your Table 6 and 7 with added mayoral cohort controls. Happy to report the law enforcement effect finding in Table 6 is largely robust to this change in model spec, 3.6% instead of 3.9%. 2/
December 18, 2025 at 3:22 PM
Interesting! Reading the paper, I quickly wondered about the linear control for "year became judge", worried it would be more appropriate to have non-linear/cohort controls for the mayoral administration at appointment. NYC mayors have pendulum'ed a lot on crime over the last 30 years. 1/
December 18, 2025 at 3:22 PM
I'm embarrassed to say I saw this story because it was hyped up in Yale's "Yale Today" daily campus-wide email. Linking to Dale and Kreuger (2002) as a palate cleanser:
www.jstor.org/stable/4132484
Estimating the Payoff to Attending a More Selective College: An Application of Selection on Observables and Unobservables on JSTOR
Stacy Berg Dale, Alan B. Krueger, Estimating the Payoff to Attending a More Selective College: An Application of Selection on Observables and Unobservables, The Quarterly Journal of Economics, Vol. 11...
www.jstor.org
December 16, 2025 at 2:03 PM