Matt Johnson

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Matt Johnson

Matt Johnson

@mslater_johnson

Labor Economist at @dukesanford. Dad of twins. Biking and compost evangelist.

Durham, NC เข้าร่วม Ağustos 2012
740 กำลังติดตาม1.5K ผู้ติดตาม
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Matt Johnson
Matt Johnson@mslater_johnson·
What happens to workplace safety and health when policy forbids employer retaliation against workers for blowing the whistle or for filing for workers’ compensation? @dannyschwab, @pwpkoval and I find out, and I’m so stoked our paper is forthcoming @restatjournal! Short 🧵... 1/
The Review of Economics and Statistics (REStat)@restatjournal

Laws forbidding retaliation for filing for workers' compensation reduced workplace injuries. Just accepted "Legal Protection against Retaliatory Firing Improves Workplace Safety" by M. Johnson @mslater_johnson; D. Schwab @dannyschwab; P. Koval @PWPKoval zcu.io/iXMv

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Matt Johnson
Matt Johnson@mslater_johnson·
Headlines like this are misguided. If college students aren't participating thoughtfully in class, the onus is not on them and use of AI--it's on us professors, who need to adapt and create class environments that challenge students to think independently futurism.com/artificial-int…
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Matt Johnson
Matt Johnson@mslater_johnson·
@mioana woohoo--congrats Ioana! Fantastic (though not surprising) news!
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Ioana Marinescu
Ioana Marinescu@mioana·
🎉I'll be promoted to full professor at the University of Pennsylvania School of Social Policy & Practice, effective July 2026! Grateful for of the many people who've helped and challenged me along the way. Now off to work on #AI and its impact on the economy, society, & policy!
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Philipp Heimberger
Philipp Heimberger@heimbergecon·
This new QJE paper concludes that the macroeconomic costs of climate change are far greater than earlier estimates suggested. It finds that a 1°C rise in global temperatures reduces world GDP by over 20%.
Philipp Heimberger tweet media
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Simon D. Halliday
Simon D. Halliday@simondhalliday·
@mslater_johnson I think it’s still feasible up to about that. I tend to have a set of compulsory questions and then a set of questions I’ll draw from and ask about depending on what they say. Less grading overall. I write each student an email report about their performance.
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Simon D. Halliday
Simon D. Halliday@simondhalliday·
File under “yet another reason my courses include oral exams” (yes I know I’m privileged to have classes small enough to manage this). Also that’s not the only thing I do but I do think they should be more widely adopted.
Kevin A. Bryan@Afinetheorem

As @alexolegimas noted in the comments, if your class is set up such that this is a problem, you haven't been paying attention. We're in year 4 of "stop giving take-home assignments that matter". But also: AI can let you run a much *better* course than pre-AI! 1/2

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Matt Johnson
Matt Johnson@mslater_johnson·
@Jabaluck I 100% agree, but it's also possible to get intoxicated by modeling, no? It took economists > a decade after Card & Krueger to accept that *maybe* a minimum wage doesn't HAVE to reduce employment. In the LR testing prevents model dogma, but modeling can create ideology too.
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Jason Abaluck
Jason Abaluck@Jabaluck·
If you don't discipline yourself with modeling and testing, it's almost impossible not to fool yourself. You'll be too reluctant to reject theories and start over from scratch, especially when rejection is ideologically inconvenient.
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Matt Johnson
Matt Johnson@mslater_johnson·
@omzidar @princetonK12 I may use a very similar letter here in Durham. My suspicion is this kind of tradeoff is absent from the school closure decision-making, or at least there is no good-faith attempt to quantify it.
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Owen Zidar
Owen Zidar@omzidar·
@princetonK12 Dear Members of the Board of Education, I am writing to ask the Board to consider the significant economic burden that snow days and delayed openings impose on working families in our district. A back-of-the-envelope calculation suggests that a single snow day costs Princeton families roughly $3 million in lost productivity, while a 90-minute delayed opening costs about $440,000. With more than 90% of families having at least one working parent—and many two—unexpected closures force parents to scramble for childcare, work while supervising children, or take unpaid time off. Student and teacher safety must always come first, and when conditions are dangerous, closures are clearly warranted. But at the margin, these decisions (like the delayed opening tomorrow after 24 hours without snowfall) carry real costs that fall most heavily on families without flexible jobs, remote options, or affordable or accessible backup care. I encourage the Board to weigh these tradeoffs carefully, explore ways to reduce unnecessary closures or delays while maintaining safety, and provide greater transparency around the decision-making process so families can better plan. Thank you for your service to our community and for considering this perspective.
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Simon D. Halliday
Simon D. Halliday@simondhalliday·
@mslater_johnson Don’t think I’m representative but I saw a bunch of posts about this. I think it may be getting drowned out by ICE, Elizabeth Warren’s electability, Claude Code posting, and (other) Matt wars.
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Andrew Greenland
Andrew Greenland@AndrewG_PhD·
We are hiring in my department! Why should you apply? 1. Great teaching research split: 3 courses /yr focused in the new masters in Agribusiness Management. 2. The Triangle is awesome. 3. The department is growing & very supportive of jrs. 4. We'd be colleagues! Link 👇
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Melissa S. Kearney
Melissa S. Kearney@kearney_melissa·
I am thrilled to be among this group at @nd_econ! 🥰🍀 PS -- But of course I will always cherish my UMD Econ colleagues and students, from whom I learned so much over the years.💕🐢
Notre Dame Economics@nd_econ

We had a banner year with hiring last year, adding 11 (yes, 11!) new full-time faculty members. Check out this @ArtsLettersND news story highlighting the new members of our community: al.nd.edu/news/latest-ne… @cmatthes_econ @SeiraEnrique @kearney_melissa

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Florian Ederer
Florian Ederer@florianederer·
Why do industries keep falling into "overbuilding bubbles"? Telcos digging fibre in the late 90s, railroads in the 19th century, AI today. Why do firms overinvest in capacity they will later struggle to scale back? Surely somebody has written a model for this?
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Matt Johnson
Matt Johnson@mslater_johnson·
@carlfordurham Thank you for your support for the 2-way initiative. How do we Durham citizens pressure the rest of the council to support the conversion?
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Carl Rist for Durham City Council
Carl Rist for Durham City Council@carlfordurham·
Incredibly scary! There have been too many pedestrian deaths this year, and another pedestrian was seriously injured on Holloway yesterday. 2-way conversion of Roxboro/Mangum was one of my top budget priorities for FY26. More support needed on council.
SidewalksOfDurham@SidewalksDurham

ICYMI, especially @mayorofbullcity, @MarkAMiddleton1, @Javiera4Durham, @DeDreanaFreeman, @carlfordurham, & @NateBakerDurham. Recent repaving has made things worse. This plus at least 4 deaths already this year on this street. We have to start fixing our dangerous @NCDOT streets!

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Matt Johnson
Matt Johnson@mslater_johnson·
@PhyloSeFizer @ashdgandhi One that seems pretty unequivocal is affirming gender fluidity and stopping in the tracks any mention of the idea that gender is fixed, for example. Beyond that, I struggle to find examples.
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Matt Johnson
Matt Johnson@mslater_johnson·
@PhyloSeFizer @ashdgandhi I second this question. What would you say are specific conservative ideas that higher education has become hostile to?
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Ashvin Gandhi
Ashvin Gandhi@ashdgandhi·
Checks out. I’m not happy about Republicans trying to destroy higher education. But I also recognize that we let ourselves become extremely hostile places to conservative ideas, so we shouldn’t be surprised that Republicans see funding us as funding the enemy.
Paul Graham@paulg

The quiet, apolitical majority of professors must be so bummed. First wokeness infected the institutions where they worked and they lost the ability to speak freely about many subjects, and now they're collateral damage in air strikes by the Republicans.

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Matt Johnson
Matt Johnson@mslater_johnson·
@jmwooldridge @unboxpolitics @MikeToffel @pedrohcgs Thanks Jeff, we should consider this! We have a funny case where inspections were randomized each year by up to 80 offices, leaving us w/ ~300 sub-experiments over 10 years. We used a stacked model where each block is a sub-experiment, centered around the year of randomization.
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Matt Johnson
Matt Johnson@mslater_johnson·
@unboxpolitics @MikeToffel @pedrohcgs @jmwooldridge Gotta dust off some memories for this one...lol. I don't think we used a full-on stacked model for this one, BUT I don't think TWFE is a concern. We did 1:1 propensity score matching, and controls were "never treated," so we don't have the negative weights concern in TWFE...
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