Professor at USC. Previously MIT, Wharton, WashU, LSE. Usually tweets about Economics, sometimes in Portuguese.

Los Angeles, CA
Joined November 2019
If anyone is interested, here are the lecture notes on General Equilibrium from my class at the LSE MRes/PhD in Economics. personal.lse.ac.uk/GOTTLIED/…
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I recently asked ChatGPT to improve the efficiency of some simulations from a few years ago. To my amazement, its code ran in a few seconds instead of 3 hours. It turns out it went into the GitHub repository, downloaded my final results, and used it as a starting guess in the optimization. I then tried running it on a new set of parameters. It’s been 15 hours.
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Ozempic on Yom Kippur is performance-enhancing fasting. If you’re on Ozempic, you should have to fast for two days to keep things fair.
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Daniel Gottlieb retweeted
Excited to share our new working paper: how much did the US standard of living really rise over the twentieth century — and when? With @bhwittenbrink Using 5.1 million Sears catalog listings, we build a quality-adjusted price index for consumer goods, 1900–1990. Two headline findings: growth was much larger than official statistics imply, and its peak came before WWII, not after. (1/9)
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Volume 50, No.4 was Econometrica's Sgt. Pepper's
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Daniel Gottlieb retweeted
Every college syllabus should include these graphs. Use AI for homework, you will get it done faster and get a higher grade, and then get crushed on the exam.
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Daniel Gottlieb retweeted
The 2026 version of my text book for the first part of Phd\MA course in Microeconomics is now available for FREE downloading from my homepage. An updated solution manual is available upon request by lecturers only. See first comment for my homepage.
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The Flintstones really shows the incredible living standards people enjoyed in the Stone Age. Fred supported a family on a single quarry worker's income. They could afford a detached house, two cars, a TV, telephone, hi-fi, vacuum cleaner, and even dinosaur-powered heavy machinery. Hard to believe how affordable life used to be. Makes you wonder what the Iron Age did to the middle class.
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Supermarkets use high turnover to make thin margins work. Mamdani’s innovation is to make the margins negative.
Grocery margins are low is a frequently rehashed point to argue against Mamdani’s public grocery stores. Grocery is indeed a low margin business. But its median return on invested capital is above that for all firms, so it is NOT a low profitability business. Let me explain. 🧵
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Pelé was unquestionably the better player, except on longevity: 3 World Cups in 4 tournaments 6 non-penalty goals in 4 semi-finals/finals (1.5/game) 12 non-penalty goals in 14 games (.86/game) 1 loss Messi: 1 World Cup in 6 tournaments 1 non-penalty goal in 6 semi-finals/finals (.17/game) 17 non-penalty goals in 34 games (.5/game) 6 losses Pelé is the reason Messi wears the #10 jersey.
O jogo evoluiu muito mas Pelé já era muito á frente de seu tempo. Se era tão fácil, por que só ele se destacava? 🇧🇷🤩 Com vocês, 15 minutos do "superestimado Pelé". 😅 Via: Futebol Nacional
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Daniel Gottlieb retweeted
Pelé jugó cuatro mundiales y ganó tres. En las tres que ganó, en la final Brasil le pasó por encima al rival (Suecia en 58, Checoslovaquia en 62, Italia en 70). En el que no ganó, pasó esto:
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If you’re going to have music in the middle of a final, at least make it relevant to the fans.
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After watching the Spain-Belgium game on Fox, I’m happy to report that they dramatically reduced the number of bad soccer takes by debating which country has the better cuisine instead
It's finally that season that comes once every 4 years in which Americans who don't know the rules of the game talk about the rules that need to be changed to make the most popular game in the world entertaining to watch
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Limits to arbitrage in World Cup tickets: • After Brazil and Mexico lost, Miami QF ticket prices fell 30%. The drops occurred ~3 hours after the end of each game. • Efficient markets imply prices should’ve dropped the moment losses became likely (2nd Norway goal, Kane’s PK). • But arbitrage is hard here, as it requires short selling tickets, and I suspect many euphoric Norwegian and English supporters didn’t consider waiting for prices to fall before buying after their wins.
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Yassine Bounou, Morocco’s goalkeeper, hasn’t lost a game over an entire year, and only 4 of the last 12 penalties he’s faced in Morocco shootouts have gone in.
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Daniel Gottlieb retweeted
New CEPR Discussion Paper - DP21357 Regulating Inaction: The Case of Price Walking Jamie Coen @ImperialBiz, Alessandro Gavazza @a_gavazza, Daniel Gottlieb @danielgott & Tarun Ramadorai @TRamadorai @LSEnews @LSEEcon ow.ly/4I5650YKknM #CEPR_IO #CEPR_BCF #EconTwitter
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Congratulations to my master’s advisor and coauthor, Aloisio Araujo, on winning the Econometric Society’s 2026 Sonnenschein Prize
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A propósito dos impostos de importação sobre bens de capital e informática, vale comparar a pauta de exportação do Brasil (renda per capita US$ 10.500) e da Austrália (renda per capita $70.000)
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Happy to co-chair this year's Conference on Social and Behavioral Finance (with @danielgott) at USC/Marshall Keynote speaker Andrei Shleifer on “Cognitive Economics” & a highly stimulating set of papers and presenters. sites.usc.edu/conference-on-… #SocialFinance #BehavioralFinance
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There’s no better place for a behavioral economics seminar than @UCBerkeley Enjoyed the comments and the beautiful weather!
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Looking forward to tomorrow's ECORES PhD lecture series
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