Assistant Professor of Economics (@barnardecon) at @BarnardCollege of @columbia. Interested in crime & criminal justice through the prism of racial inequality.

The Bronx, NY
Joined December 2012
Really excited to share that both my better half (@bfoxwilliams) and I were selected as 2024-25 @RussellSageFdn Visiting Scholars. Looking forward to joining such an impressive group of scholars.
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Morgan C Williams Jr retweeted
If you're on the job market in IO or know someone who is, add your name to the list (or pass on the link). Ppl on the 'demand' side of the market tell me they look at this list both during the market (e.g. for hiring) and after (e.g. for inviting to seminars, etc.).
The running list of IO job market candidates for 2026-2027 is live! Fill this out to add your info if you are an econ job market candidate in industrial organization this year: forms.gle/kSRAxu8NAFsJ1AXB6 Running list here: shoshanavasserman.com/io-jmc…
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Morgan C Williams Jr retweeted
Work for us as a full-time Research Professional in health economics! Opportunities available in Chicago through both @nberpubs and @UChicago @BeckerFriedman. Apply below / please share: workforcenow.adp.com/mascsr/… job-boards.greenhouse.io/bfi…
New pre-doc opening with @GottliebEcon, Maggie Shi, @zarekcb, and @ProfNoto at @BeckerFriedman Learn more at bit.ly/45CKBwU
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📢 We're hiring! BFI and @UChiEnergy are seeking a full-time Research Professional to work with Professor Koichiro Ito on energy and environmental policy research across the US and internationally. 📍 Chicago, IL 📅 Start: Summer 2027 Apply now: job-boards.greenhouse.io/uch…
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Morgan C Williams Jr retweeted
I have an announcement, folks! I'm on the Selection Committee for a new, $1 million academic prize. The Carob Trust Prize for Academic Courage will support scholars whose work is original, rigorous, impactful, and courageous — even when it's unpopular. thecarobtrust.org/the-prize
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Morgan C Williams Jr retweeted
Check out our new package!
Parallel trends in doubt? The Triply Robust Panel (TROP) estimator relaxes it and now has official Python and Stata packages. Python (pip install trop): github.com/zhaonanq/TROP-Est… Stata: github.com/justinwaddy/TROP Built by Zhaonan Qu, Xuelin Yang, Justin Waddy & Damian Clarke Why "triply robust": TROP combines unit weights, time weights and a regression adjustment based on a low-rank factor model. Its bias is bounded by the product of unit imbalance, time imbalance and misspecification of the regression adjustment, so it is asymptotically unbiased if any one of the three removes the underlying bias. In 20 of 21 simulation designs calibrated to widely used datasets (CPS, Penn World Table, and case studies such as the Basque Country and German reunification), TROP had the lowest RMSE of six estimators, including DID, synthetic control and SDID. With few treated units and periods, other estimators become more competitive. Both packages choose tuning parameters by cross-validation and report bootstrap standard errors and confidence intervals. Paper by @Susan_Athey (our Faculty Director), @guido_imbens, Zhaonan Qu and @VivianoDavide , now in the Journal of Applied Econometrics: doi.org/10.1002/jae.70061 (arXiv version: arxiv.org/abs/2508.21536)
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I’ll take the tie, but what’s abundantly clear to me is that we *do not* have a RB1. Mistakes happen of course, but Skattebo has fumbled in other high-stakes situations too. I don’t trust any of the other RBs either. Still first in the NFC East tho. Let’s go Giants!
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Morgan C Williams Jr retweeted
Applications are now open for the 2027 AEA Summer Training Program at American University. Please share with any promising young economists! #teachecon @AEACSMGEP american.edu/cas/economics/a…
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Morgan C Williams Jr retweeted
Congratulations to all the new Fellows of the @econometricsoc ! Many friends are here. I am particularly happy to see my coauthors Nezih @NezihGuner and Daniel @DanielYiXu in the list.
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Morgan C Williams Jr retweeted
Please enjoy! Writeup: dropbox.com/scl/fi/ago5vsi89… Repo: github.com/peterdhull/twfe-r… Planning to expand to other journals soon
Why has no one done the massive AI-assisted "how much do negative weights really matter for difference-in-difference" review paper yet?
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Morgan C Williams Jr retweeted
We are delighted to share the program for the 7th WIE Conference, this year at @DukeEcon , the home of several heavy weights in international trade. Anusha Chari as keynote, @DanielYiXu, @dix_rafael, and Craig Burnside as session chairs. Co-organized by @lcastillomart @AmSantacreu @mmorl89 @StefaniaGaretto . sites.google.com/view/wie-co…
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Morgan C Williams Jr retweeted
Ok, this is in progress! Here's a preview (Top-5 pubs from the last ten years with a simple TWFE specification + replication data; matched samples between TWFE, Callaway-Sant'Anna, and Borusyak-Jaravel-Spiess) with thanks to Astra, Kevin Chen, & Jon Roth
Why has no one done the massive AI-assisted "how much do negative weights really matter for difference-in-difference" review paper yet?
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📢 Call for Fellowship: AI in the Workplace The Kenneth C. Griffin Applied Economics Incubator invites faculty and PhD students to apply for its Spring Quarter 2027 AI in the Workplace Fellowship. drive.google.com/file/d/1-iG…
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Morgan C Williams Jr retweeted
Ariell Reshef and I have a new draft out. It is a paper about one figure. From 1850-1970 the employment share of legal services is constant. Between 1970-1990 it doubles, and then stabilizes at the new, higher, level. Lawyers' relative wages exhibit the same trend. What happened?
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Morgan C Williams Jr retweeted
Fantastic economics of crime conference happening in the UK in May, and I'm excited to be a part of it. Organized by @El_Guarnieri and Arnaud Philippe. Please submit your papers! More info: baem.info/CfP_CRI_27.pdf
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Morgan C Williams Jr retweeted
I am hiring a full-time predoctoral research fellow at Stanford @SIEPR to work on topics across economic history and the economics of AI.
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Morgan C Williams Jr retweeted
🚨New predoc position!🚨 @AlexBartik and I are hiring a predoc at NYU Stern, starting Fall 2027 You would help us build AI tools to measure zoning rules and study how regulation impacts housing supply Ideal for AI enthusiasts who want to get a PhD apply.interfolio.com/194498
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Morgan C Williams Jr retweeted
The Economics department (@econGU) at the University of Gothenburg is hiring two tenure track Assistant Professors - one in Applied Micro (especially labor, health, education, inequality, and crime) one in Environmental Economics. Spread the word! econjobmarket.org/positions/…
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Morgan C Williams Jr retweeted
If I were the social planner, the next Nobel Prize in Economics would be awarded to Samuel Bowles, Glenn Loury, and John Roemer (as I wrote last year). Their work is foundational to the modern study of inequality, addressing normative and positive dimensions with profound insight. Bowles has made so many contributions to the study of inequality it is hard to summarize them. His work on contested exchange, which places power imperfect information at the center of labor market equilibrium, was decades ahead of the modern focus on monopsony and has been a foundational challenge to classical human capital theory. Sam was equally farseeing in his work on identity and the totality of personality/worldview as determining outcomes of workers. As such, he raised issues of identity far before others. He has been integral in addressing the determinants of intergenerational mobility, addressing (and concluding it was second order) the role of genes in inequality. Glenn Loury has deeply transformed our understanding intergenerational mobility and racial inequality. Three stand out. His model of family investment and intergenerational mobility (developed independently from Becker and Tomes) remains the workhorse model of intergenerational mobility. His integration of social capital into intergenerational mobility models provided essential insights in the ways that nonconvexities can produce multiple steady states for communities starting at different initial conditions. His work with Stephen Coate on remains the foundation of the theory of affirmative action and incentives. His work on stigma and spoiled identity has profound implications for persistent racial inequality; in my opinion Glenn's The Anatomy of Racial Inequality is profound and underappreciated. John Roemer has made essential contributions to both philosophy and economics. In philosophy, he pioneered the idea of responsibility-sensitive egalitarianism as a foundation for understanding equality of opportunity. As such, John's work represents a major challenge to Rawlsian ideas of justice. This work has also led to important empirical work that has reformulated measures of intergenerational persistence via metrics for inherited inequality. In economics, he has done foundational work on developing rigorous formulations of Marxian economics (one especially important example is his reformulation of the idea of exploitation), the interactions of inequality and electoral outcomes, and Kantian equilibrium with attendant implications for intra and intergroup inequality.
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Morgan C Williams Jr retweeted
The running list of IO job market candidates for 2026-2027 is live! Fill this out to add your info if you are an econ job market candidate in industrial organization this year: forms.gle/kSRAxu8NAFsJ1AXB6 Running list here: shoshanavasserman.com/io-jmc…
If you're on the market as an IO or IO-adjacent economist, I really encourage you to sign up. I've heard of people using this list for many things, both during the market (e.g. recruiting) and after (e.g. inviting for seminars). It's an easy way to get some exposure.
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