Hi everyone, Thank you so much for the support these past days. Reading your messages has been incredibly warming, and your kindness has meant a lot to me. I appreciate every donation, every share, and every word of encouragement. Thank you so much. 🙏

5/ Thank you for taking the time to read my story. 🙏

4/ I’ve created a GoFundMe to help cover medical and living expenses during this recovery period, since I’m unable to work right now. If you are able to support or share, it would mean a great deal to me. 👉 https://t.co/jahXZo6tjI

3/ I’ve been on Twitter for a long time, interacting with many of you and sharing news and ideas about economics and research. This might be the first time I’m reaching out in this way.

2/ The good news is that the worst has already passed, and now I’m focusing on my recovery. I am still undergoing neurological rehab, physical therapy, and follow-up scans as I work every day to regain my health and finish my PhD.

1/ Hi, my name is Isaac Martinez. I am a PhD student in Economics at the LSE, and I wanted to share something personal. On July 6, 2025, I suffered a stroke while I was finishing my PhD. It was completely unexpected and changed my life. #EconTwitter #EconJobMarket

A puzzle of the "Great Inflation" of 2021-24: Why did U.S. house prices stay so resilient while those in Sweden & Canada saw sharp corrections? 🏠🤔 We argue in our new @cepr_org DP that a huge part of the answer lies in the type of mortgages people have https://t.co/yJ8kiMK79b

You should probably use this moment to update your priors on the credibility of research with private data from firms that authors are contracted never to share. It's not replicable and the returns to fraud are high. What would the representative agent do?

This is super cool (also a study on survivorship bias): when AI profs bail for industry jobs, their students start fewer AI startups and raise less cash. Turns out academic AI knowledge actually matters for startup success! ​​​​​​​​​​​​​​​​🔗 https://t.co/U0koYq9MMa

How Tariffs Affect Trade Deficits... ... a new paper with amazing trade economist Arnaud Costinot. Many politicians and the general public expect tariffs to reduce imports lower imports and thus work to close a trade deficit. Economists typically say "not so fast"... 🧵1/n

Because most trade is in intermediate goods and the Diamond-Mirrlees production efficiency lemma shows that taxes should not be levied on intermediate goods.

Muy interesante como fueron calculados los aranceles recíprocos ayer… acá unas breves notas por si alguien está buscando su derivación 🧐

This type of error is why people need to learn macro. The general equilibrium (and exchange rate effects!) are *not* small for a policy of this scope. The assumptions that lead to this formula are not satified, so this formula cannot be used for the stated goal.

Trump's insane tariffs are the culmination of decades of American activists lying to the public and telling them that the most economically successful nation in human history was actually a disaster: https://t.co/lvN8LOlvIF

A short thread on where the reciprocal tariffs are coming from and the some of the underlying assumptions... 👇

"I wish that business had absolutely zero political power in America, and we rejected neoliberalism"

It's over. ChatGPT 4.5 passes the Turing Test.

This chart seems to suggest that something is going wrong in the United States, specifically. ( https://t.co/rLn46bNP7W )

Within academia, the job market is particularly difficult this year. A dearth of interviews and jobs. The exact same thing happened when I went on the job market years ago: 150 applications, 1 interview! Back then I wondered about the implications. So, what did I do? I wrote

🏅 Premio Fronteras del Conocimiento a Olivier Blanchard @ojblanchard1 (@PSEinfo, @MIT), Jordi Galí (@CREI) y Michael Woodford (@Columbia) por su profunda influencia en la macroeconomía moderna y en el diseño de reglas de política monetaria y fiscal https://t.co/7liFnv7ghG