Amit Gandhi がリツイート
Big congratulations to Aryan Gandhi ‘33 who won the Boys U11 Texas Squash JCT today in Houston! We are #SCHproud of you, Aryan! #GoDevils @DWilsonSCH @sdruggan @USSQUASH @PhSportsDigest
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Amit Gandhi
198 posts
Amit Gandhi
@AmitEcon
Vice President and Technical Fellow at Airbnb (former Chief Economist at Microsoft Azure)
Philadelphia, PA 参加日 Haziran 2013
116 フォロー中730 フォロワー
Amit Gandhi がリツイート
I am super hyped to finally share the first release of plumber2 with all of you. This has been the center of my attention for a big part of 2025 and I hope you'll find it a worthy update to the venerable plumber package.
#rstats
tidyverse.org/blog/2025/09/p…
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Very happy to see the new Master of Applied Economics and Data Science (MEDS) at @penneconomics accepting applications for first cohort to enter in August 2026! MEDS is five years in the making, and took three chairs, Frank Schorfheide, myself and Petra Todd, to bring it to life!
Jesús Fernández-Villaverde@JesusFerna7026
🚨 I’m extremely happy to announce that the new Master of Applied Economics and Data Science (MEDS) at @penneconomics is now accepting applicants for entry in August 2026: 🔗 lps.upenn.edu/degree-program… MEDS is a program that Frank Schorfheide (as chair) and I (as DGS) helped spearhead, but reaching this exciting stage has been possible thanks to the dedication of the whole department and @Penn’s administration. I would like to highlight in particular the two MEDS directors: Michael Lipsitz and Frank Diebold. It’s hard to imagine two better people to lead a program designed to give ambitious students cutting-edge skills at the intersection of modern economics and data science. 👉 If that sounds like you, check out the MEDS webpage!
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Longer thread incoming, but @R_Thaler and I have a new book coming out “Winner’s Curse: Behavioral Economics Anomalies—Then and Now”, out on October 21.
And our UK publisher is running a promo!
Waterstones@Waterstones
Mondays have a bad reputation but we're taking the edge off this one with 25% off selected upcoming books until August! Bag yourself a bargain here: waterstones.com
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@AndreyFradkin @openrouter so cool! How to think about the dependent variable I wonder (time, tokens, prompts)?
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🚨 New working paper 🚨
Demand for LLMs: Descriptive Evidence on
Substitution, Market Expansion, and Multi-Homing
A key question for the business of AI is the extent to which LLMs are differentiated from each other. I use data from @openrouter to take a first look. cc @alexatallah
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@preposterior how do you differentiate data science and statistical analysis and when to build a stochastic model in one versus the other?
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I once wrestled with choosing between R and Python, hindered by the syntax barrier. Now, with LLMs like ChatGPT, Claude, or Copilot, I focus on goals: NodeJS for web backends, React Native for mobile apps, Python for data science, and R for statistical analysis. Let AI handle the syntax so you can innovate freely.
François Chollet@fchollet
A programming language has a dual purpose: to enable you to express programs, and to shape the way you think about programming. Languages program you.
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Amit Gandhi がリツイート
GNRProdEst.jl Update!
Main new feature: Bootstrapped Standard Errors!
I just released the latest update of my @JuliaLanguage implementation of the production function estimation method from @AmitEcon, @snavarrol, Rivers (2020).
Check it out here github.com/MarkusTrunschk…
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Amit Gandhi がリツイート
One person I feel who is insufficiently appreciated is Hadley Wickham. The results of his work are everywhere, every journal and conference I know. He changed the history of science.
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GNR took 12+ years to complete from idea to publication. During that time Stata remained the required language to communicate with the profession. Amazing to see how far the field has come with open source and modern software standards.
Thanks @MTrunschketo - can't wait to use!
Markus Trunschke@MTrunschke
Btw, I recently finished my @JuliaLanguage implementation of the @AmitEcon , @snavarrol, Rievers (2020) production function estimation method. It's a now a registered Julia package! Go check it out here github.com/MarkusTrunschk… Feel free to contribute to dev and improve it.
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Couldn't agree more @LeistenEcon :) In all seriousness - zero shares are rampant inside of business environments and the corrections have first order effects on the insights derived. Fine tuning the priors in an Empirical Bayes kind of way sounds fascinating - thx for sharing.
Matthew Leisten@LeistenEcon
The Gandhi et al. (2023) approach to zero empirical shares is so intuitive & I don't know why it isn't more widely adopted. Like, of course s_ij = 0 because true choice probs are positive but small and we only observe finite demand draws! onlinelibrary.wiley.com/doi/full/10.39…
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Amit Gandhi がリツイート
"Perfection is impossible.
In the 1,526 singles matches I played in my career, I won almost 80% of those matches.
But what percentage of points did I win?
54%
In other words, even top ranked tennis players win barely more than half the points they play.
When you lose ever second point on average, you learn not to dwell on every shot.
You teach yourself to think:
'Okay, I double faulted...it's only a point.'
'Okay, I came to the net and I got passed again...it's only a point.'
Even a great shot, an overhead backhand smash that ends up on ESPN's top 10 playlist – that too is just a point.
Here's why I'm telling you this.
When you're playing a point, it has to be the most important thing in the world. And it is.
But when it's behind you, it's behind you.
This mindset is crucial – because it frees you to fully commit to the next point with intensity, clarity, and focus."
–@rogerfederer
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Amit Gandhi がリツイート
The world's first 60+ FPS e-ink display by @daylightco on Episode 45 of S³
See how it works, the 6-year development journey, and Daylight's vision for the future of personal computing.
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Excited to discuss the state of data and tech with my former colleague Francesco Decarolis - thanks to the organizers for the invitation.
Giacomo M. Anastasia@GiAnastasia
... Francesco Decarolis & @AmitEcon, Pietro Garibaldi & Antonio Spilimbergo, Stefano Corgnati & Marco Ottaviani, Michael Jordan & James Manyika & Michael Spence, David Card & @Danielle__Li & @wellingmax, and many more... 7/
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Amit Gandhi がリツイート
One of my favorite tools for visualization of big data is tippecanoe, which converts millions of spatial features (like building footprints) into scale-sensitive vector tiles
github.com/felt/tippecanoe
You can use tippecanoe in #rstats via its wrapper in the mapboxapi package: walker-data.com/mapboxapi/arti…
GIF
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Amit Gandhi がリツイート
Thrilled to see the innovation unfold at the #Wharton Hack-AI-thon! Best of luck to all participants! #AI #Innovation #AnalyticsAtWharton
Wharton Human-AI Research@WhartonHumanAI
Excited to kick off our inaugural #Wharton Hack-AI-thon with a special thanks to @AIatWharton faculty co-director @StefanoPuntoni for starting the day! We can't wait to see the innovative apps & prompts from our talented #students. Best of luck to everyone! #AI #Innovation
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Amit Gandhi がリツイート
We're thrilled to welcome @AmitEcon and Cornelia Walther to our team as Visiting Scholars! Their expertise in corporate partnerships and leveraging technology for pro-social change will help take our analytics mission to greater heights.
Learn more here: analytics.wharton.upenn.edu/news/amit-gand…
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Amit Gandhi がリツイート
Excited to share our work w/ @hamsabastani and @obastani as my debut post at X!
Wharton AI & Analytics Initiative@WhartonAIAI
Learn how @Wharton PhD student, @AngelTHChung, leveraged machine learning to help the government of Sierra Leone distribute limited medical aid to the communities who need it most, as we continue to highlight Wharton Women in Analytics. whr.tn/43ChQhO
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