Caleb Kwon

@ksangani8 @Ebehi_Iyoha This is really important work. I learned a lot. Thanks!

"Incomplete pass-through" (when costs rise 10%, prices rise <10%) is often "complete pass-through in levels" in disguise (costs rise 10 cents/unit, so prices rise 10 cents/unit). Turns out this simple pattern can explain several other features of the data.

@vartanshad Looks awesome! Looking forward to reading the draft.

Was thrilled to present some of my work at a guest lecture for the graduate behavioral economics course at Princeton yesterday. Watch this space for more on bounded rationality in games!

@jeff_gortmaker @PrincetonEcon @NYUSternEcon @conlon_chris Congratulations Jeff!

My job market's done, and I'm heading back to the NYC area! Excited to join @PrincetonEcon as a postdoc next year and @NYUSternEcon as an AP in 2026. In a happy twist of fate, this means @conlon_chris and I will be colleagues exactly 10 years after our first PyBLP commit:

@JordanJNorris Congrats Jordan! This was a fantastic read.

Happy to see one of my PhD chapters published at the JIE

@jeff_gortmaker This is amazing Jeff, all the best on the market with your excellent paper.

Hey #EconTwitter, I'm on the job market with a paper about open source software. OSS is a global public good, widely used and provided by the private sector, but the target of recent industrial policy. Paper: jeffgortmaker.com/files/Open_Sou… 1/

@rdahis Super cool Ricardo. Amazing work!

@ksangani8 @alz_zyd_ SUPER exciting research.

@alz_zyd_ Your prediction is true broadly cutting by income/educ! (though I haven't checked for organic specifically) Caveat: estimates using historical Nielsen Scanner data to predict 2020–2023, but others are finding differences of this magnitude in the data kunalsangani.com/files/complete…

I have a hunch: - Democrats buy a larger % of organic groceries - Organic grocery prices rose less in % terms than non-organic groceries - Hence democrats have a misleadingly small perception of grocery price inflation facing the representative consumer

@jeff_gortmaker @_amackay This is a really nice addition. Wonderful stuff, Jeff!

If you want to try out this approach in your own BLP estimation, PyBLP has pretty good support! Thanks to @_amackay for helping with getting it added. Adding covariance restrictions was fairly straightforward, with one sort of obscure technical challenge. 1/6

@lilyxu0 @Columbia @UniofOxford @t8el @NatureRecovery Many congratulations to you Lily!

I'm thrilled to share that I'll start as an Assistant Professor at @Columbia IEOR in July 2025!! My lab will continue to push research on AI + OR for biodiversity, planetary health, and social impact. Until then, I'll be a postdoc at @UniofOxford with @t8el and @NatureRecovery.

@jeff_gortmaker @conlon_chris Can't wait!

Excited to teach this workshop! It combines what I've learned from teaching demand estimation and Python to doctoral students, fielding PyBLP questions from users in academia/government/industry, and my own research with @conlon_chris. Check it out: mixtapesessions.io/session/demand…

@Spacehuskyx @florianederer Of course! Quick summary: Markups are (roughly) how much retailers charge above cost. If a retailer buys a pack of Oreos for $1 and sells it for $1.25, that's a 25% markup. There's a large body of evidence that markups (in retail and beyond) have been rising for several decades

@TinglongDai @JHUCarey @JohnsHopkins @JHU_HBHI @JHUNursing @IDIESJHU @INFORMS @PomsSociety @MSOMSociety @JHU_Alumni @JHUMediaTeam Major congratulations Tinglong!

Christmas has come early. I am deeply honored and grateful to be named the Bernard T. Ferrari Professor at @JHUCarey. My heartfelt thanks to everyone for supporting me along the way. Wish you and your loved ones a holiday season filled with joy, health, and love!

@ksangani8 @BaldwinRE @voxeu This is fantastic and super informative.

Three graphs on why rising costs create disproportionate inflation for low-income households (many thanks @BaldwinRE and @voxeu for covering!)

@jeff_gortmaker Fantastic, Jeff!

Updated version of our "micro BLP" paper! My earlier thread (twitter.com/jeff_gortmaker…) summarizes some of the key points.

That’s a wrap on BOMSI ‘23, the Behavioral Operations Management Summer Institute for doctoral students at @HarvardHBS. Steve Leider and Jordan Tong are the best co-conspirators imaginable, and the future of our field is bright! @INFORMS @PomsSociety #bom

@ksangani8 @nummoose @WSJ This is a really cool paper!

@nummoose and my recent analysis on market reactions to Fed press conferences in the @WSJ ! Let's see if Chair Powell bucks the trend today :) wsj.com/livecoverage/f…