News & Musings

News & Musings

Herein below you can read/ access my latest posts from the BlueSky and Twitter (X) platforms (the custom Twitter (X) feed updates with a substantial lag and sometimes chaotically). You are obviously better off reading/ following me directly on Twitter (X) and/or on BlueSky and/or on Mastodon and/or on Threads for full functionality. (NB. The latter three platform feeds, unlike Twitter (X), are readable also if not logged in on the corresponding platform.)

 

Retweet on Twitter Sebastian Buhai Retweeted
ecmaEditors avatar Econometrica @ecmaEditors ·
24 Aug 2091873161101066602

95% of Amazon shoppers consider only the prominent "Buybox" offer—and Amazon's own offers are featured as often as similar offers priced 5% cheaper. Yet, as consumers prefer these offers, this article finds that the skew roughly maximizes consumer surplus.
https://www.econometricsociety.org/publications/econometrica/forthcoming-papers/0000/00/00/Two-Sided-Markets-Shaped-by-Platform-Guided-Search/file/22288-3.pdf

Image for the Tweet beginning: 95% of Amazon shoppers consider Twitter feed image.
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sbuhai avatar Sebastian Buhai @sbuhai ·
24 Aug 2091728346430201956

Cerro Manquehuito, conquistado hoy.
La próxima vez vamos por el Cerro Manquehue en cuanto convenzamos a nuestra hija de que toda bajada tiene un costo fijo: la subida. Su impecable contraoferta consiste en partir desde la cumbre y dejarle el resto a la gravedad. 🛝

Image for the Tweet beginning: Cerro Manquehuito, conquistado hoy. La próxima Twitter feed image.
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Retweet on Twitter Sebastian Buhai Retweeted
__alpoge__ avatar levent @__alpoge__ ·
23 Aug 2091639597193368014

Please welcome to the world a beautiful new geometric object, to do with a problem i’ve always loved. claude really contains multitudes:D Does S^6 admit a complex structure?

Yup

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Retweet on Twitter Sebastian Buhai Retweeted
glviolante avatar Gianluca Violante @glviolante ·
19 Aug 2090061190395232361

Once again, I am extremely grateful to the @econometricsoc for the Frisch Medal, which I received yesterday together with my stellar coauthors @NiklasEngbom and @Simon_Mongey in the picture with me. We missed @AdrienBilal who could not make it to Dublin!

Image for the Tweet beginning: Once again, I am extremely Twitter feed image.
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Retweet on Twitter Sebastian Buhai Retweeted
pushmeet avatar Pushmeet Kohli @pushmeet ·
18 Aug 2089717134129565763

Matrix multiplication is the basic computational operation that powers modern computing (including AI). Yet, the theoretical fastest speed at which computers can multiply matrices (omega ω) is still unknown and has been a longstanding challenge for complexity theory and computer

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sbuhai avatar Sebastian Buhai @sbuhai ·
18 Aug 2089729767016706159

The one fixed effect "xhdfe" apparently cannot absorb is Miguel’s modesty. But partial that out and the estimate is hard to miss: absurdly fast, brutally robust and—in the technical language of the profession—quite possibly the 𝑏𝑒𝑠𝑡𝑒𝑠𝑡 command out there. Replicate at will!

Miguel Portela @portela_miguel

Together with @tgstavares , we created xhdfe, a command for estimating high-dimensional fixed-effects linear models, it is available for Stata, R, and Python, with support for both CPU and GPU:
https://github.com/reisportela/xhdfe-xfe
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