Martín Fernández Sánchez

Hi #EconTwitter, I am glad to share with you my JMP: "Mass Emigration and Human Capital over a Century: Evidence from the Galician Diaspora". It is the result of two years learning about my ancestors. Find the paper and more info about me at: sites.google.com/view/martinfer… 1/13

🚨 Visiting Faculty position @SFU Fields: Economic History, Political Economy, Development - Summer or 1-2 semesters in 2027-28 - Up to $55k stipend + $7.5k research support - Visa + moving support ⏰ Apply by May 4 🔗👇

Come and work for me in beautiful Zurich! Hiring for pre-doc positions is open. Details here: Long hours, hard work, tough tasks guaranteed. jobs.uzh.ch/job-vacancies/…

Es un placer publicar hoy en @EsadeEcPol este "Policy Brief" basado en una investigación académica junto a Damon Clark y Pierre Deschamps. ¿Reducir el tamaño de la clase mejora los resultados educativos? Lo analizamos con microdatos administrativos, encuestas y evidencia causal

@m_clem Really excting Michael! All the best in this new chapter!

I'm honored and excited to join the faculty of America's oldest research university, Johns Hopkins. I'll start this summer as a full professor, one of the founding faculty at the brand-new School of Government and Policy. We're building something unique & historic.

I’ve been doing a series on Claude code for “quantitative social scientists” on my substack. It’s not much a series I guess as much as I am regularly documenting what I’m learning. It started mid Dec 2025 and will continue. causalinf.substack.com/s/claude-code

@VincentGeloso @nunopgpalma @joachim_voth @JesusFerna7026 Here you go! tinyurl.com/yrt5z8j2 Soon we will have a draft 👌. Now, to come back to your first question, two recent papers using AI that I find fascinating are "State of the art" (Gorin, Heblich, Zylberberg) and "Images" (Voth & Yanagizawa-Drott), but you alredy know these😁

@MartinFS13 @nunopgpalma @joachim_voth @JesusFerna7026 Yes

Economic historians: give me your favorite papers that used recent advances in AI to produce new datasets cc. @nunopgpalma @joachim_voth @JesusFerna7026 (please RT also so that people can use quote to track answers).

Join us for the Migration session of the Bristol Applied Economics Meetings (BÆM)! 📅 6-7 May 2026 📢 Invited talks by Ran Abramitzky (@StanfordEcon), @JoanMonrasEcon, @ctheoharides Submission deadline: 31 Jan 2026! Limited funding available Apply now: baem.info/CfP_MIG_26.pdf

🌳 Luxembourg = a fantastic place to live. Top quality of life, lots of ammenities, nature everywhere, free public transport, and super international, >50% foreign-born! Plus, superb connections (🚆: Paris 2h, Brussels 3h, Zurich 4 | ✈️: Milan 1h15, London 1h30, Barcelona 2h)

🌍 Be part of an exceptional group of migration scholars. To name a few, Frédéric Docquier, Christina Ghatmann, André Gröeger, Joël Machado, Michał Burzyński, Lisa Timm, Narcisse Cha’Ngom, Rana Cömertpay.. and myself 😁! Plus, many more fantastic colleagues across various topics!

📢 We’re hiring a Postdoc at LISER!! Join a vibrant research institute and an outstanding group of researchers. You will be part of the Crossing Borders team, which will be led by Andre Groeger. Please share widely! 🙏 econjobmarket.org/positions/12206 Three reasons to apply 👇

📢Call for papers! We are organising 7th Workshop on the Economics and Politics of Migration on 28-29 May 2026, in Rome! Keynotes: Paolo Pinotti (Bocconi University) and Vicky Fouka (Stanford University). Submit your papers before January 23, 2026: tinyurl.com/2fvf5j9p

Hi all, please spread the word and we hope everyone can make good use of this new data drop: CMFdata.org The full surviving establishment-level Census of Manufactures manuscripts from 1850, 1860, 1870, and 1880!

@pegobry_en There are many good potential explanations out there... Here is one, for isntance; De la Croix, D. and F. Mariani (2015): "From polygyny to serial monogamy: a unified theory of marriage institutions", Review of Economic Studies 82 (2), 565-607.

It’s stunning to me that there doesn’t seem to be a good history of monogamy out there. It’s one of the strangest inventions out there and it’s kind of a miracle it stuck.

We are conducting an RCT on refugee integration in Luxembourg in partnerhsip with JPAL, and we urgently need a research assistant to help us with the data collection. So do not hesitate to apply, take part in this exciting project, and join a fantastic team 🤩

@VVeltkrieger Your maps look amazing! great job 👏! It would be fantastic to add in a comment a reference to the original source/s, to then more easily reuse the data/info

My current understanding of the Corded Ware Migration: Red: Before 2900bc Orange: 2900-2700bc Green: 2700-2500bc Blue: After 2500bc

Our paper "Is Mobile Money Changing Rural Africa? Evidence from a Field Experiment" is now in print in the Review of Economics and Statistics! Main finding? Mobile money increased out-migration from rural areas and reduced agricultural investment. 🔗 doi.org/10.1162/rest_a…

✨Did markets make Americans more cooperative❓🔍 ✅YES‼️ Between 1850 and 1920, the US became the largest and most integrated economy in the world 📶🌎 We show that this shift didn’t just move goods and affect prices—it fundamentally changed culture and behavior 🧵 👇 1/17