Xiao Ma

@YueyuanM Big congratulations!

Thrilled to share that my paper, "Specialization in a Knowledge Economy," is now out in JPE Macro: journals.uchicago.edu/toc/jpema/curr…! Thanks to @ChrisTonetti for handling the paper, and to the anonymous referees!

@YuchengYang1993 Great chance! I will let my students know

The summer school is 𝐟𝐫𝐞𝐞 𝐨𝐟 𝐜𝐡𝐚𝐫𝐠𝐞 (participants cover travel/accommodation). PhD students & junior faculty are welcome to apply! liboecon.com/2026_summer_sc… Note: China offers visa-free entry for 50+ countries, including most of Europe, Canada, Australia, Japan, etc.

🚨🚨Application open: PKU-Zurich PhD Summer School on 𝐌𝐚𝐜𝐡𝐢𝐧𝐞 𝐋𝐞𝐚𝐫𝐧𝐢𝐧𝐠 𝐟𝐨𝐫 𝐌𝐚𝐜𝐫𝐨 & 𝐅𝐢𝐧𝐚𝐧𝐜𝐞 📍Beijing, July 6–10 Coherent lectures by @ben_moll @comp_simon Weinan E, Kubler, S Maliar, Payne, Gopalakrishna & me. Apply by April 6 forms.gle/c28uSndiUvqXtm…

How Restrictive is U.S. Trade Policy? I wrote up a short note answering this question here waugheconomics.com/uploads/2/2/5/…

Here is a new post-doc opportunity at @Kennedy_School to work with @DaniRodrik and me on place-based and industrial policy: hks.harvard.edu/centers/wiener…. Come join us!

New paper alert 🚨! Low-income countries differ not only in what they produce, but how they produce: fewer large firms, far more self-employment. What drives these gaps in firm organization? And is this distinct from standard structural transformation? A 🧵 w/ some results 1/

Proud @UCSDEcon student Paula Donaldson @paudonaldson discovered something huge: We have been measuring government spending effects wrong for years. When using state comparisons to estimate fiscal policy, we assumed interest rates affect all states equally. But they don't🧵

@MunseobLee @StephanHaggard @GPS_UCSD Big congratulations!

Honored to be named the Lawrence B. and Salley K. Krause Chair in Korean Studies. The previous holder @StephanHaggard and Korea-Pacific Program founder Lawrence Krause have been role models since I joined @GPS_UCSD. Grateful to continue their legacy at gps.ucsd.edu/kpp

My new paper with Aaron Flaaen, Ali Hortacsu, @FelixTintelnot, and Nicolas Urdaneta on tariff passthrough along the supply chain.

Our new paper on industrial policy in the renewal energy sector — a comparison between the U.S., EU, and China and an inquiry for potential green policy coordination.

VoxDev has a great summary of our new paper. The lesson is also relevant for the design of domestic offset market for China’s national ETS.

Post-doc opportunity. Please apply if you are interested in firm-to-firm trade networks: 👇 aeaweb.org/joe/listing.ph…

A beta version of my slide deck for my upcoming lecture on Geoeconomics at Oxford this Friday is now online: sas.upenn.edu/~jesusfv/Lectu… I’m looking for feedback: What else should I include? Are there any important citations I might have missed? Please note: I don’t have room for more than 50 text slides, and I want to highlight how machine learning can be a powerful tool in this field, so I need to be selective. Still, any suggestions are most welcome, especially as I’m considering turning this into a longer course. @chris_d_clayton, @m_maggiori, @JSchreger, @lugaricano, @CathrinMohr, @Ch_Trebesch, @VGB32058943: you might find this of some interest.

My Op Ed with Professor James Heckman @heckmanequation wsj.com/opinion/the-re…

@KyleLHandley Congrats!

Professional news: UCSD promoted me to full professor. Many thanks to all the coauthors, advisors, friends family and fellow academic travelers that supported me. My senior year of high school I wrote that I wanted to be an "economist" at a bank for a Psych AP reflection project without knowing what that would entail, but here I am now. Very grateful to be here these past ~5 years with my amazing colleagues @GPS_UCSD at one of the best public universities in the world. Best career move ever.

🚨Excited for incredible lineup at @nberpubs conference on **Energy Markets, Decarbonization, and Trade** 🗓️This Thurs/Fri 3/20-21: Organized w Natalia Ramondo, supported by @SloanFoundation Full agenda and streaming link in next post below👇

@JacobOrchard5 Congrats, Jake!

This was a fun paper to work on. Happy to see it in print.

How agricultural productivity gaps have evolved over the last four decades, from Douglas Gollin, @LagakosDavid, @xiaomaucsd, and Shraddha Mandi nber.org/papers/w33529

Looking for a predoctoral opportunity for next year? Join @rodrikdani and me at the Reimagining the Economy Project @Kennedy_School hks.harvard.edu/centers/wiener…

@YajieWang_econ @firooz_hamid @zliu001 Congrats!

🚀 Excited to share our paper, "Automation and the Rise of Superstar Firms", now available online in the Journal of Monetary Economics! Read it for free here (until March 5, 2025): authors.elsevier.com/c/1kRPm15DWI35… Co-authored with @firooz_hamid @zliu001

@YajieWang_econ @firooz_hamid @zliu001 Congrats!