Our new @nberpubs paper extends Fogel’s social-savings approach to account for congestion and spatial externalities. These forces can change infrastructure priorities. Full explanation in the video below (sound on 🔊). ⬇️

Hope to see many of you tomorrow at the Chicago Fed for our North American meeting! For those arriving in town early today, there is a casual happy hour at Theory (9 W. Hubbard Street) from 5 to 8pm See more details and final program in the link below urbaneconomics.org/meetings/…

We're hiring an Asst Prof in Macro at NC State, preferably overlapping adjacent fields (international, labor, IO etc). Ideally experienced; fresh PhDs welcome. Great Duke/UNC interactions in Research Triangle. Review begins Sept 28. Let me know if you have questions. Links below.

Interested in working on transportation, urban economics and/or industrial organization? I am hiring a pre-doc starting in July 2027. Please see details of the position below 👇 chicagobooth.edu/-/media/fac…

📢 The International Seminar on Trade (ISoT) returns for its 3rd edition! 📍 ifo Institute, Munich 🗓️ 20–21 May 2027 📅 Deadline: 10 Jan 2027 Co-organised by @JIntlEcon, @LMU_Muenchen, @CESifoNetwork, @ifo_Institut, @WorldBankGroup & @cepr_org 🔗 sciencedirect.com/journal/jo…

Understanding the Navier-Stokes blow-up? I created a new Tangible lesson to explain the concept of blow-up: from ordinary differential equations, to gravity, heat equation…and Navier-Stokes ! huggingface.co/spaces/dlouap…

Super excited to announce the @AtlantaFed is starting a new "day visitor program": come spend the day with us the day of the finance seminar, we will get you an office for the day and you can interact with us and the speaker: atlanta-finance-seminar.com/

We are hiring! See postings below.

Looking forward to this year's Spatial @ SEA sessions! It's our biggest and baddest program yet 😈

Ricci flow for maps! 😂 (Not really, no "curvature"... But the idea that you evolve a PDE and then the answer becomes "obvious"...)

Mathematician Hong Wang of @nyuniversity and @Institut_IHES has won the 2026 Fields Medal. Wang explored harmonic analysis and geometric measure theory, making major advances in Fourier restriction and the Kakeya problem in three dimensions. Watch her full video and see all of the Fields Medal winners: bit.ly/4psOJbU #math #ICM2026 #FieldsMedal

🚢How vulnerable is global shipping to disruptions? We study this question with @SimonFuchs4 and @WoanFoongWong in a new paper we presented last week at the International Trade and Investment (ITI) program of the @nberpubs's Summer Institute. We develop a theory to characterize the determinants of maritime vulnerability, use new data to measure exposure to geographic and operational disruptions, and build a quantitative spatial general equilibrium model with endogenous shipping services to quantify their potential effects. Our key findings so far are that exposure does not imply vulnerability. We characterize where maritime vulnerabilities arise across shipping routes, chokepoints, and services, and examine their potential impact. Exposure becomes vulnerability when disruptions are difficult to bypass and dependence is asymmetric, so that one country bears much larger costs than the country with the ability to disrupt shipping. These asymmetries turn maritime dependence into geopolitical leverage. We’ll have a paper up soon. In the meantime, check out our slides here: conference.nber.org/conf_pap…

The 18th Conference on Urban and Regional Economics (CURE) will be October 9–10 at Columbia University. Submission deadline is July 25: docs.google.com/forms/d/e/1F…

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)

Exciting week at the NBER SI where we presented our new work (with @LeiboviciF and @WoanFoongWong) on 𝐆𝐞𝐨𝐩𝐨𝐥𝐢𝐭𝐢𝐜𝐚𝐥 𝐑𝐢𝐬𝐤 𝐚𝐧𝐝 𝐅𝐨𝐫𝐞𝐢𝐠𝐧 𝐃𝐞𝐩𝐞𝐧𝐝𝐞𝐧𝐜𝐞 𝐢𝐧 𝐆𝐥𝐨𝐛𝐚𝐥 𝐒𝐡𝐢𝐩𝐩𝐢𝐧𝐠. Slides are here: conference.nber.org/conf_pap… Comments welcome!

🥳