Just a guy doctor economics

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Joined October 2010
– at Greenwood, IN
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The @Colts suck – at Greenwood, IN
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THE 22 YEAR WAIT IS OVER. ARSENAL ARE PREMIER LEAGUE CHAMPIONS!
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An absolute banger of a paper. “A Gentle Introduction to Matrix Calculus” by econometrics legend Jan Magnus — one of the clearest explanations of matrix derivatives ever written. If you work in econometrics, machine learning, statistics, or optimisation, this paper is pure gold.
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Colin Steitz retweeted
Econometrica Volume 94, Issue 1 (January 2026) is now online econometricsociety.org/publi…
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In response to the many requests, we have compiled most of the data from our paper into clean, easily accessible files so others can explore and build on our work. 👉dropbox.com/scl/fo/u1en2c928… If you use the data for research or reports, please cite our paper! @XinchengQiu
My paper with Iourii Manovskii & @XinchengQiu "The Geography of Job Creation and Job Destruction" is now out in the Journal of Monetary Economics doi.org/10.1016/j.jmoneco.20… We document novel facts on spatial labor market differences and how a textbook model accounts for them!
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Food for thought! "Ricardian Non-Equivalence" by Martin Eichenbaum, Joao Guerreiro, and Jana Obradovic. "This paper presents new survey evidence on how household spending responds to fiscal transfers. Our key finding is that the planned propensity to spend out of transfers equals the marginal propensity to consume (MPC), implying that households do not incorporate future tax liabilities into their spending plans. The canonical HANK model cannot account for this evidence because households are overly sensitive to future taxes. We develop an extended HANK model in which households are partially inattentive to future tax liabilities and to general equilibrium effects of fiscal policy. This inattention dampens forward-looking intertemporal MPCs and increases transfer and spending multipliers." jguerreiro.com/files/EGO_RNE…
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Highly relevant! "Macroeconomic Impacts of Microeconomic Damages in General Equilibrium: Productivity and Capital Losses" by Marc A. C. Hafstead and Roberton C. Williams III. nber.org/papers/w34661
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Colin Steitz retweeted
Zookeepers in Japan have dressed up as pandas after the real animals were returned to China Visitors can pay around $51 to feed and take care of the “pandas”
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Colin Steitz retweeted
Some exciting new IV identification results with cool applications thereof (if I say so myself!)
Extending IV identification and kappa-weighting to cover more elaborate scenarios, from @metrics52, Andres Santos, and Otávio Tecchio nber.org/papers/w34607
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Colin Steitz retweeted
TYRESE HALIBURTON
What was the greatest sports moment of 2025?
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Katharina Bergant has put together a very nice session today chaired by @MartinUribeEcon on AI and macro research. Very excited to attend and see my co-author Ken Teoh present our new paper on LLMs and cross-border flow restrictions (stay tunned as it will come out next week!)
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Colin Steitz retweeted
Adding heterogeneous firms to a HANK model uncovers the central role of marginal propensities to invest in the transmission mechanism of monetary and fiscal policy, from Thomas Winberry, @a_auclert, Matthew Rognlie, and @ludwigstraub nber.org/papers/w34611
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Super interesting! "The Allocation of Time and Remote Work" by Christos Makridis. "...productivity gains reflect reallocation toward more productive, remote intensive industries and selection of relatively productive workers into those industries." papers.ssrn.com/sol3/papers.…
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Modern AI for Economics Research: I found this 3 part conversation with @ben_golub on Markus Academy @MarkusEconomist really interesting. It changed the way I use AI. youtube.com/watch?v=SAXElKwk…
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Colin Steitz retweeted
I recently taught a short course on Causal Effects in Macroeconomics and Local Projections. Here is a snapshot of the contents, and I created a website with the slides, in case others find them useful. Comments are welcomed! sites.google.com/view/lpcour…
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Highly recommended! "The Macroeconomic Effects of Tariffs: Evidence From U.S. Historical Data" by Tamar den Besten and Diego R. Känzig. "We study the macroeconomic effects of tariff policy using U.S. historical data from 1840–2024. We construct a narrative series of plausibly exogenous tariff changes – based on major legislative actions, multilateral negotiations, and temporary surcharges – and use it as an instrument to identify a structural tariff shock. Tariff increases are consistently contractionary: imports fall sharply, exports decline with a lag, and output and manufacturing activity drop persistently. The shock transmits through both supply and demand channels. Prices rise in the full sample but fall post-WWII, a pattern consistent with changes in the monetary policy response and with stronger international retaliation and reciprocity in the modern trade regime." dkaenzig.github.io/diegokaen…
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GENERATIONAL TALENT! TELL EVERYONE ELSE TO KEEP UP! CRY TO YOUR MOMMA! YOUR NEWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWW 2x WORLD CHAMPION THE YOUNG GOAT MAXWELL JACOB FRIEDMAN SEE YOU LOSERS ON WEDNESDAY!
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