Was your train delayed or cancelled this weekend? Mine was. Do you crave research that speaks to this particular experience? Look no further. In a new paper, @xinmingdu.bsky.social and I quantify how much rail safety and operations are affected by the weather.

The best, clearest article I've read yet on recent regulatory changes. The crucial bigger picture, that I agree has been overlooked, is that the health benefits from regulations are no longer being quantified. Lives are being valued at zero de facto because they are being ignored.

Call for papers: HISTORY OF CLIMATE ECONOMICS Details at: journals.openedition.org/oeconomia/19... Editors of the Special Issue Christophe Cassen (CNRS, CIRED Paris) Béatrice Cointe (CNRS, CSI Paris) Antoine Missemer (CNRS, CIRED Paris) Deadline for abstracts : January 15th, 2026

I love that the justification for assigning zero quantitative value to health benefits is that they're uncertain. Because there's obviously no uncertainty on the compliance-cost side of the ledger. No need to worry about "false precision" there. www.nytimes.com/2026/01/12/c...

Apparently this marks the end of a 13 year blogging hiatus. www.paulkelleher.net/blog/2025/12... @madisoncondon.bsky.social @alybatt.bsky.social @lissaharris.bsky.social @lpeblog.bsky.social

This is a fascinating paper. It's the first (afaik) to actually document food&drink&retail scheduling unpredictability using actual firm data. It illustrates v clearly why unpredictable scheduling makes these jobs so difficult:

Hi! I’m Mary and I’m on the #EconJobMarket this year. Extreme heat doesn’t just affect students, it affects the people teaching them. JMP 🧵:

Analysis based on work by @rdbressler.bsky.social on the mortality consequences of climate change, including our co-authored paper on country-level climate damages www.nature.com/articles/s41...

Here's a few things I learned digging into electricity affordability and decarbonization in Connecticut 🧵

Really well-done article by @fastlerner.bsky.social that estimated temperature-related mortality impacts from recent climate rollbacks, drawing in part on my 2021 Nature Comms paper and my job market paper (bsky.app/profile/rdbr...). Check it out!

Should the carbon price be the same across countries and sectors? Four kinds of imperfections call for differentiated carbon prices: 1. Different growth rates 2. Market power in trade 3. The presence of country- or sector-specific distorsive taxes 4. A constraint preventing cross-country transfers

A lot of Americans like to blame the Reagan Administration for the rise of market power and oligopoly in the US. But markups have been rising globally (except in South America) since 1980. Seems likely that other causes were at play: drive.google.com/file/d/1W7A9...

🚨New Paper🚨 Valuing statistical absences? Why benefit-cost analysis cannot avoid population ethics" My new paper with regulatory legal scholar extraordinaire Andy Stawasz is out in Ecological Economics! www.sciencedirect.com/science/arti...

We had an all-star group of job market candidates this year and an all-star job market coordinator @rmetcalfe.bsky.social . Great set of placements in a really tough year. Proud to be a part of this group!

"The uncertainty that is baked into this crisis is all the more reason to take urgent and decisive action to address it."

NEW: Fossil fuel firms like Chevron and Exxon owe the world trillions of dollars. Today in @nature.com, @jsmankin.bsky.social and I show economic losses from rising heat waves directly traceable to these firms, providing scientific support for climate accountability. www.nature.com/articles/s41...

Job Market Done ✅ I'm thrilled to announce that I will be an Assistant Professor in Economics at Bentley University this fall. I'm excited to join a great group of colleagues and to move back to Boston!

New preprint finding that eliminating US global health funding over the next fifteen years would cause: - 15.2m deaths from AIDS - 2.2m deaths from TB - 7.9 additional child deaths

Mississippi State Univ. is hiring a tenure-track Econ Assistant Prof w/ August start! Open field; pref. for applied micro & teaching PhD Micro I & II (Micro II this fall). Apply: MSU site & www.aeaweb.org/joe/listing.php?JOE_ID=2025-01_111475768 Please repost—it's an off-cycle search. Thanks!

There are days in life that shake you. I’m shattered 💔 to share that I just found out that the US Government terminated my 2024 NIH Director’s Early Independence Award (~$2 million), threatening my long-promised assistant professor job at Columbia University & academic career... 1/🧵

Essential reading for folks interested in the economics of climate change. Check it out!

Planning your climate or environment syllabus? I like to show short videos so students & I can visualize some of the things we're talking about. Here are some of the ones I like:

The world is awful. The world is much better. The world can be much better. All three statements are true at the same time. Understanding this is key to solving big global problems. We believe data & research can help us understand both the problems we face & the progress that’s possible. 🧵

What’s important about this piece is economic theory, when translated into practice, needs to overcorrect for the actual impacts to people’s lives that efficiency driven by theory create. It’s not “winners COULD compensate losers” it’s “winners DO compensate losers”. www.nytimes.com/2024/12/23/o...

Excited to announce a new @pnas.org publication on the Social Cost of Carbon. We integrate evidence from the literature and expert survey to provide an SCC distribution inclusive of both parametric and structural uncertainties. Our mean 2020 value is $283 per ton CO2 www.pnas.org/doi/10.1073/...

Extreme heat is preferentially killing young adults and small children, finds a new study co-led by @rdbressler.bsky.social and @ajsw.info with Columbia Climate School's Radley Horton, @adamsobel.bsky.social, @ccivanovich.bsky.social (now NASAGISS), Jeffrey Shrader, and colleagues. Via CBS News.

Save the date: 9th Conference on Econometric Models of Climate Change (EMCC) will be at the University of Victoria BC, Canada, Aug. 27-28, 2025. Come if you want to learn about climate and econometrics (or just want to visit Vancouver Island...) Formal call for papers to follow in 2025. #EconSky

🚨"Heat disproportionally kills young people: Evidence from Wet-Bulb Temperature Exposure" My new paper co-lead with @ajsw.info is out today! Using 20 years of nationwide mortality microdata + wet-bulb temperature, we uncovered fascinating new findings. Thread 👇 www.science.org/doi/10.1126/...

See below for a really nice writeup from @columbiaclimate.bsky.social on my recent @science.org article co-lead with @ajsw.info Here is my thread summarizing the study: bsky.app/profile/rdbr...

Amazing to see this work dreamed up by Danny and I in the early years of our PhDs in its final form! By combining high resolution climate and mortality data, we paint a more complete picture of the evolving risk for temperature-related deaths in Mexico. Take a read!

On Friday afternoon at #AGU24, I'll be presenting this new (and, frankly, worrying) work of ours on extreme heat and mortality. Come see it! Poster GC53C-0380.

VSL, discounting and the SCC

What’s the most important choice in determining the social cost of carbon (SCC)? My #EconJMP shows that because deaths from emitting CO2 are large and concentrated in poor countries, valuing lives is the most consequential choice in determining the SCC in latest-gen models, more than discounting 🧵👇

Thread below on my new @science.org article with some interesting new findings that came out Friday with a great team of coauthors. I'm the social media engagement genius who posted this on a Friday evening...check it out if you haven't seen it yet!

This is my work on agricultural impacts, accounting for CO2 fertilization, adaptation, and potential benefits of warming in colder regions. We find net-negative productivity effects for almost all areas www.nature.com/articles/s41...

This work by myself and @rdbressler.bsky.social shows net negative effects of climate change on mortality, again accounting for potential benefits of fewer cold extremes www.nature.com/articles/s41... The Climate Impact Lab's analysis has similar findings: academic.oup.com/qje/article/...

Great paper from my brilliant climate scientist colleague @ccivanovich.bsky.social and economists @rdbressler.bsky.social @ajsw.info ! Great example also how we can improve climate impacts studies when incentives align to allow for this kind of interdisciplinary collaboration and design.

Important and well-researched work from @rdbressler.bsky.social, @ccivanovich.bsky.social, @regclimo.bsky.social amongst many others on the author list. www.science.org/doi/10.1126/...

#EconSky #ClimateSky #science

Here I am just scrolling about my day, gobbling up this fascinating new research and reading the discussion out loud to my family before I realized I actually know one of the authors (@ajsw.info). Excellent work!

Danny is on the market this year, which is going to be quite the opportunity for some department, somewhere:

Super cool paper by a Columbia allstars team!

This is very interesting - and highlights why a shifting tropics may have big health implications

🌡️ Heat kills the young disproportionately. A study in Mexico, and published in @science.org, reveals 75% of heat-related deaths affect those under 35. Projections show this trend worsening with climate change. 🔗 www.science.org/doi/10.1126/... #ClimateCrisis 🧪 #SciComm

🚨"Heat disproportionally kills young people: Evidence from Wet-Bulb Temperature Exposure" My new paper co-lead with @ajsw.info is out today! Using 20 years of nationwide mortality microdata + wet-bulb temperature, we uncovered fascinating new findings. Thread 👇 www.science.org/doi/10.1126/...

Are you interested in the health and economic impacts of climate change? I've spent my PhD researching this. Now I'm on the job market! Thread below highlighting my published/working papers from my first publication to my #JMP I'll start with my first publication, in @naturecomms.bsky.social

In a new interdisciplinary Nature Climate Change Perspective paper, led by me, @lisgilmore and Rachael Shwom, we offer a critical perspective on #climate and social “tipping points.” 🎁: rdcu.be/d2gBC 🧵

I couldn’t ask for better mentors and would highly encourage anyone interested in environmental economics to apply!

Most climate deaths will occur in developing countries, especially in slow-growth scenarios where adaptation is unaffordable. Framing climate change as an inequality problem —not an extinction risk— highlights the need for global aid, LMIC growth, and valuing all lives equally.