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It's time

There's been a lot of recent confusion on here on how mirrors work, and I suspect the optical illusion in this photo is contributing to AI concerns. As a Professor of Economics, I can assure everyone this is a normal (though rare) physical phenomenon x.com/HumansNoContex…

Aj. Peter Hull cara idk how they did it but ive seen it today at the vatican, its real, not some AI

Autor, Dorn, and Hanson is the canonical shift-share paper, and something you should absolutely have read and understood if you want to do serious work in economics today. 1/

Shift-share instruments are now used in so many contexts. You should open up Borusyak, Hull, and Jaravel (2025) now. (“A Practical Guide to Shift Share Instruments”) pubs.aeaweb.org/doi/pdfplus/10…

A checklist of things to do. (I really can’t add much here).

Read this thread if you want to learn about some really awesome methods in measuring the effects of trade on regions! (And also, well, the effect of anything on any unit of observation).

The Next Generation

I'm hiring a predoc - more info here: academicpositions.harvard.edu/postings/14905 #econtwitter

can someone explain to me why we're talking about work requirements for *health insurance*?

Excited to start editing at AEJ: Applied (AEA Journals) August 1st! Send me/us your best papers!

Whelp. Turns out Stuart was right wsj.com/tech/ai/mit-sa…

Great chart on Medicaid work requirements from Aella

hey man, can’t hang tonight. i’m being spiritually dismantled by robust standard errors talk soon