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Morgan C. Williams, Jr.

@mwilljr.bsky.social
7.2K followers 1K following 104 posts

Assistant Professor of Economics at @barnard-college.bsky.social of @columbiauniversity.bsky.social. Interested in crime & criminal justice through the prism of racial inequality. Website: morganwilliamsjr.com

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Morgan C. Williams, Jr. @mwilljr.bsky.social · 11/09/2025
Check out our latest @vitalcitynyc.bsky.social piece on the role of states in regulating the proliferation of guns throughout the U.S. www.vitalcitynyc.org/articles/sta...
vitalcitynyc.org
Vital City | State Gun Laws Matter
In our federalist nation, regulation in 50 capitals makes a huge difference.
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Prof Dynarski @dynarski.bsky.social · 08/09/2025
WSJ editorial page is wild these past few days
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Morgan C. Williams, Jr. @mwilljr.bsky.social · 08/09/2025
As I told the NYT, the recent deployment of the National Guard to select Democratic cities has been criticized for many incredibly valid reasons—including the fact that they are not a substitute for municipal police.
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Morgan C. Williams, Jr. @mwilljr.bsky.social · 07/04/2025
So much winning…. www.nytimes.com/2025/04/06/b...
nytimes.com
Global Stocks Drop, Extending Rout Caused by Trump’s Tariffs
A brutal day for markets around the world added to the pain of last week’s market turmoil, with the S&P 500 index nearing a bear market.
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Morgan C. Williams, Jr. @mwilljr.bsky.social · 04/02/2025
Note that while “bias” will get your proposal flagged, “unbiased estimator” still appears to be on the table.
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𝙼𝚎𝚐𝚊𝚗 𝙺𝚊𝚗𝚐 @mkang.bsky.social · 20/12/2024
Added more gun researchers to this starter pack who joined BlueSky. Please share and lmk if you’d like to be added! @daniel-semenza.bsky.social @vitalcitynyc.bsky.social @meganranney.bsky.social @sonalirajan.bsky.social @thetrace.org @giffords.org @everytown.bsky.social go.bsky.app/G9zEmHs
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Aaron Sojourner @aaronsojourner.org · 07/10/2024
Former BLS commissioner Erica Groshen on how the policy change to Schedule F that Trump & #Project2025 advocate would destroy the credibility of the federal statistical system. Her comment on LinkedIn www.linkedin.com/posts/erica-... ...
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Phil Lewis @phillewis.bsky.social · 10/12/2024
Virginia Tech professor and poet, Nikki Giovanni, has died at the age of 81.
wdbj7.com
Well-known Virginia Tech professor dies at 81
Virginia Tech professor and poet, Nikki Giovanni, has died at the age of 81.
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Paul Krugman @pkrugman.bsky.social · 06/12/2024
Nonetheless, I decided to leave in search of more freedom in terms of both style and content. And that’s all I’m going to say for now. My “so long and thanks for all the fish” column will appear next week. As for future plans, watch this space 2/
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Paul Krugman @pkrugman.bsky.social · 06/12/2024
And it’s official. I’m immensely grateful to the world’s greatest news organization for giving me a platform all these years, and greatly appreciate the moving sendoff 1/ www.nytco.com/press/paul-k...
nytco.com
Paul Krugman retires as Times columnist | The New York Times Company
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Sandile Hlatshwayo @femmeeconomics.bsky.social · 05/12/2024
Welcome, @marthaolney.bsky.social!! Yes - @riacton.bsky.social has put together two women+ in econ starter packs.
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Sandy Black @econsandy.bsky.social · 29/11/2024
How do firms respond when faced with climate shocks? Tarikua Erda's research examines how firms adjust physical capital investment and entry/exit decisions, providing key evidence to a long-standing puzzle. (Among other interesting projects: www.tarikuaerda.com)
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Tarikua Erda @tarikuaerda.bsky.social · 04/12/2024
I’m on the #EconJobMarket! I study labor, climate, entrepreneurship & innovation www.tarikuaerda.com/jmp My #EconJMP examines how how manufacturing firms respond to flooding. Do flooded firms build back better? Or do they suffer unrecoverable losses that weaken aggregate productivity? 🧵 1/n
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Morgan C. Williams, Jr. @mwilljr.bsky.social · 04/12/2024
ggplot alone will change your life.
media.tenor.com
a bald man in a blue suit is pointing at the words come join us .
ALT: a bald man in a blue suit is pointing at the words come join us .
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David Cutler @davidmcutler.bsky.social · 04/12/2024
Ed Glaeser and I wrote about the future of cities for the IMF. Fun topic to think about. www.imf.org/en/Publicati...
imf.org
The Mysteries of Cities and Economic Growth
It’s impossible to think about economic growth without also thinking about cities’ vital role in connecting the world
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Jesse Anttila-Hughes @jessexjesse.bsky.social · 03/12/2024
Welcome! go.bsky.app/RyKSzcb
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Joy-Ann Reid @joyannreid.bsky.social · 03/12/2024
Hey #blacksky ‼️ So good to have left the bad place. Someone please share a starter pack!
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Morgan C. Williams, Jr. @mwilljr.bsky.social · 04/12/2024
I had an IV joke, but it’s getting pretty LATE.
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Peter Hull @instrumenthull.bsky.social · 13/11/2024
Regression is a tool for making comparisons If you don't know / can't easily explain what comparisons you're trying to make, then you don't understand the regression you're running
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Trevon Logan @trevondlogan.bsky.social · 02/12/2024
The Race and Stratification Working Group at NBER will have its annual meeting on Friday, April 4, 2025! Dania Francis, Vicki Bogan, Ellora Derenoncourt and I are organizing the program. Submit your paper before the December 19, 2024 deadline! conference.nber.org/confsubmit/b...
conference.nber.org
Submission: Race and Stratification Working Group, Page 1 of 2 - MyNBERNBER: National Bureau of Economic Research
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Paul Goldsmith-Pinkham @paulgp.com · 30/11/2024
Economists love using linear regression to estimate treatment effects — it turns out that there are perils to this method, but also amazing perks Come with me in this 🧵 if you want to learn about our now-published paper "Contamination Bias in Linear Regressions!" 1/ (Twitter rerun!)
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Scott Kominers @skominers.bsky.social · 28/11/2024
Thanksgiving this year falls on the 28th, and 28 is a perfect number – meaning that it is equal to the sum of its proper divisors (28 = 1 + 2 + 4 + 7 + 14). So... I hope you have a truly perfect #Thanksgiving!!
media.tenor.com
a group of turkeys are standing in a line with one standing out
ALT: a group of turkeys are standing in a line with one standing out
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David A. Jaeger (econ) @davidajaeger.bsky.social · 27/11/2024
Pleased to announce the Fourth Annual Scotland and Northern England Conference in Applied Microeconomics at the Crief Hydro Hotel in Perthshire on 6-8 May 2025! Our keynote speaker is @ludogazze.bsky.social More info & submission link at applied-microecon.wp.st-andrews.ac.uk/sane-worksho...
Crieff Hydro Hotel
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Peter Hull @instrumenthull.bsky.social · 27/11/2024
Contamination Bias in Linear Regressions -- out today in the AER! www.dropbox.com/scl/fi/x4bc1...
dropbox.com
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Matthew Yglesias @mattyglesias.bsky.social · 28/11/2024
This seems wrong to me — at a minimum, using AI will let below-average doctors achieve average-ish levels of performance which would be a huge win even if there are no other benefits. www.pewresearch.org/short-reads/...
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Morgan C. Williams, Jr. @mwilljr.bsky.social · 28/11/2024
Everyone should give @vitalcitynyc.bsky.social a follow! A great urban policy journal with contributions from an impressive array of scholars and practitioners—including yours truly!
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Vital City @vitalcitynyc.bsky.social · 27/11/2024
We built a starter pack (a work in progress) of some people who know a lot about New York City policy — and assorted others of interest. go.bsky.app/FCDEhhc
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Journal of Public Economics @jpube.bsky.social · 27/11/2024
We've created a starter pack for all of the economics journals on Bluesky. Please nominate other journals to join the list. go.bsky.app/4kR21vX
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Rafe Meager (they/them) @economeager.bsky.social · 27/11/2024
We still have a relatively poor understanding of the relationship between evidence and policy. Program evaluation in particular is often motivated by a desire to make policy better. But how effective is program evaluation itself?Michelle Rao's JMP tackles this question. www.michellerao.com/research
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Paul Goldsmith-Pinkham @paulgp.com · 31/10/2024
2. Researchers *do* make many specification choices in the current environment. For example, functional form of the outcome (log vs. level?), set of controls (how many FE?), and the set of UNITS to include. We need to have a more balanced look at this trade-off.
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Morgan C. Williams, Jr. @mwilljr.bsky.social · 26/11/2024
Outstanding piece from @mattyglesias.bsky.social and complementary thread from Thomas below. Some recent CJ efforts involve (low-level) offenses that lack a social consensus on punishment—yet come with non-trivial social costs. Ignoring the costs doesn’t make it good policy or more “progressive.”
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Matthew Yglesias @mattyglesias.bsky.social · 25/11/2024
Really thoughtful thread here with useful concrete details
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Alex Imas @aleximas.bsky.social · 25/11/2024
Folks! Our excellent BFI institute at UChicago is on here, give them a follow. They do an excellent podcast (the PIE) and host great conferences/workshops with open call-for-papers.
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Florian Ederer @florianederer.bsky.social · 25/11/2024
We wrote a short VoxEU column about our "Anonymity and Identity Online" paper and its broader implications. cepr.org/voxeu/column...
cepr.org
Anonymity and identity online
Policy discussions around online anonymity have intensified in academic and professional communities. While anonymity facilitates free expression, it also liberates offensive conduct. This column identifies links between the Economics Job Market Rumors forum and patterns of user behaviour. Initially created to support job-market candidates in economics, the site has become a platform for sexist, racist, and defamatory posts, raising questions about the balance between protecting free speech, addressing the harms associated with anonymous online behaviour, and efforts to make economics a safer and more welcoming discipline.
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NBER @nber.org · 19/11/2024
Nationwide, Black children are placed into foster care at higher rates than white children with identical potential to experience subsequent maltreatment — though less than in the past, from E. Jason Baron, Joseph J. Doyle Jr., Natalia Emanuel, and Peter Hull www.nber.org/papers/w33154
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Morgan C. Williams, Jr. @mwilljr.bsky.social · 24/11/2024
Tobias clearly chose violence this morning 😂😂😂
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Trevon Logan @trevondlogan.bsky.social · 22/11/2024
So excited to see my research on White women’s involvement with the business if American slavery in the New York Times! www.nytimes.com/2024/11/22/u...
nytimes.com
White Women Were Active in the American Slave Trade, Statistical Research Shows
For generations, scholars argued that white women were rarely involved in the active buying and selling of Black people. A growing body of research says otherwise.
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Don Moynihan @donmoyn.bsky.social · 22/11/2024
Huge thanks to Kirabo - @appam.bsky.social has supported about 300 equity and inclusion fellows in recent years to broaden the pipeline of policy scholars and practitioners.
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Rajiv Sethi @rajivsethi.bsky.social · 22/11/2024
The most useful starter pack I've seen so far
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Paul Goldsmith-Pinkham @paulgp.com · 22/11/2024
In order to add some clarity on why the answer is just "use robust SE", here's a simulations that follow Abadie et al.'s paper "When Should You Adjust Standard Errors for Clustering?" This is pure random assignment of treatment. Cluster SE are way too big, and robust SE are close.
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James Feigenbaum @jamesfeigenbaum.bsky.social · 21/11/2024
So what is everyone else doing for replication packages #EconSky? All #rstats empirical paper without too many computational bells and whistles.
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Morgan C. Williams, Jr. @mwilljr.bsky.social · 21/11/2024
I thought you guys were my friends?!?!
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Arin Dube @arindube.bsky.social · 16/09/2024
If you are interested in learning more about minimum wages, Attila Lindner and I have a new, up-to-date review of the topic, coming out in the Handbook of Labor Economics. Here's the @nberpubs working paper. Link: nber.org/papers/w32878
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The Visible Hand Podcast @visiblehandpod.bsky.social · 21/11/2024
In the spirit of moving from the other place, I am re-advertising here the first episode of the podcast series: @florianederer.bsky.social on Killer Acquisitions. Listen at www.thevisiblehand.uk/episodes/epi...
thevisiblehand.uk
Episode 1: Florian Ederer on Killer Acquisitions — The Visible Hand
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Peter Hull @instrumenthull.bsky.social · 19/11/2024
Next up: Aarushi Kalra (aarushirita.github.io), experimenter extraordinaire! Aarushi works on development, political economy, and the digital platforms/AI. Her JMP studies a massive RCT run on one of India's largest social media platforms, which shut down the content personalization algorithm(!)
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Sydnee Caldwell @sydneecaldwell.bsky.social · 21/11/2024
Submit your papers for the spring 2025 NBER Gender in the Economy meeting! The theme is "Women in the Digital World". Submission Deadline: 12/9/24 Meeting: 2/28/25 in Cambridge t.co/DGsccq6Blw
t.co
https://www.nber.org/conferences/gender-economy-spring-2025
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John Pfaff @johnpfaff.bsky.social · 20/11/2024
Interesting paper. Uses an intriguing shock to arrests (reductions in arrests after an on-duty officer death) to measure impact of ARRESTS on crime. Most studies measure impact of NUMBER OF COPS on crime. Get MUCH lower effects, suggesting police-crime reduction driven by PRESENCE >> arrests.
papers.ssrn.com
Do Police Make Too Many Arrests? The Effect of Enforcement Pullbacks on Crime
Do reductions in arrests increase crime? We study line-of-duty deaths of police officers, events that likely impact police behavior through increased fear but a
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John Roman @johnkroman.bsky.social · 19/11/2024
Greeting new Bluesky people! And welcome. Here are 100 ideas for reducing crime and improving safety without more police and prisons. johnkroman.substack.com/p/100-ideas-... And a summary version at Vital City: www.vitalcitynyc.org/articles/twe...
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Aaron Sojourner @aaronsojourner.org · 19/11/2024
Welcome, @drlisadcook.bsky.social! 1st member of the Board of Governors on here. Given Fed comms policies, I doubt she can post anything much. But hopefully we can create some value for her in the #EconSky, #NumbersDay, and other conversations.
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David Slusky @davidslusky.bsky.social · 11/11/2024
We’re here! Follow us for organizational updates and recommendations.
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