Ariel Ortiz-Bobea

Sure. You're referring to changes in the output mix (share of ruminant livestock in output). That's possible. Note that our study is historical and we don't see substantial changes in the output mix (share of livestock in output) across income regions (see below). More movements in input mix.

6/ Links:
- press release: news.cornell.edu/stories/2026...
- paper: www.science.org/doi/10.1126/...
- code+data: data.socialsciences.cornell.edu/dataset.xhtm...

thanks for reading!

5/ The bad news is that global TFP growth is slowing down, so a key driver keeping GHG emissions somewhat in check may not be as important moving forward... unless, of course, policy makers snap back and begin re-prioritizing public ag R&D.

4/ In the article we go a bit deeper and try to assess the role of land and labor inputs, and we find that stronger decoupling is associated with places with stronger gains in land productivity (Y/Xland) rather than gains in labor productivity (Y/Xlabor).

3/ You can reduce emissions by 1- reducing output (not a good idea), 2- reducing input emission intensity, or 3- increasing TFP.

We find is that most of the historical reduction in ag GHG (ΔE) stem from increases in productivity (Δ(Y/X)) rather than reductions in input emission intensity (Δ(E/X)).

2/ There's been a lot of discussion about "decoupling" GHG and production. We take a historical look by decomposing the growth of GHG (ΔE) into a sum of growth in output (ΔY), growth in input emission intensity (Δ(E/X)) and growth in Total Factor Productivity (Δ(Y/X)):

ΔE = ΔY + Δ(E/X) - Δ(Y/X)

More productive farming lowers global emissions | Cornell Chronicle A new analysis shows that improved farm productivity has been the driving force in keeping global greenhouse gas emissions from agriculture in check, with implications for how countries support farmer...

1/ Lots going on these days, but I'm nonetheless happy to share a paper out today in Science Advances together with Simone Pieralli (European Commission Joint Research Centre) titled "Unpacking the growth of global agricultural greenhouse gas emissions".

news.cornell.edu/stories/2026...

Like boiling frogs

A little bit late, but I'm looking to hire a postdoc at Cornell to measure the private value of soil health improvements in US ag. A 2-year gig.

Well suited for an ag/resource economist or data scientist w/ interests in soil health and solid programming & econometric chops.

ad coming soon!

What can she see that everyone can see?

need to beef up the budget to welcome international visitors, just sayin'

Interesting. Is this the first time the AEA bans a member for life?

Proper use of a bar chart

I'm excited, the RCT suggests Malengo increases psychological well‑being by about 0.36 standard deviations. As a reference point, this is similar in magnitude to the improvements after vision-restoring cataract surgery.

This is not obvious a priori!

Exciting news on @malengo.org, the NGO that helps East African students move to Europe for education: Our research team has given us a glimpse of their early findings!

Here is the full writeup, joint with @richardnerland.bsky.social:

forum.effectivealtruism.org/posts/CpZYHk...

Thread follows!

That’s what I imagined. I hope you keep at it. To me this is such a fundamental aspect of science. We (researchers) think we are immune to all sorts of biases, but we are subject to path dependence and what others before us chose to explore and “found” to be true.

We're going through the second 100-year shock to the academic job market in the past 5 years

We need candidates for AEA directors and presidents to be talking about concrete things like this, not how many top articles, cites or awards they have.

Update on the state of the job market courtesy of a nudge by @gottliebecon.bsky.social

It's bad!

paulgp.com/2025/11/24/j...

Eva, cool study. I imagine you've had this in the works for quite a while. So congrats!

One point that I don't know if you can address here (or later) is to what extend people use previous published results as priors. i.e. does confidence and/or accuracy increase the more mature a literature is?

📢 Just accepted in #JAERE 📢 is now posted at @aereorg.bsky.social!
📍 Follow @aereorg.bsky.social to stay updated on all things REEP and JAERE.
#EconSky 📈📉

Enough time for catcher to take a selfie

That was a poor pitch down the middle! You can’t do that with that guy

“If you can afford it”

Serious scholars have examined what happens when we change the number of H1-B visas issued.

Cities that get more H1-B immigrants subsequently see the wages of natives *rise* substantially.

Skilled immigrants bring new ideas, fill labor shortages and make us all more productive.

Submission: 8th Annual NBER Environmental and Energy Policy and the Economy Conference, Page 1 of 2 - MyNBER

Hey, #EconSky! Got a policy-relevant paper that you want folks in DC to see? Present & publish it with NBER's Environmental and Energy Policy and the Economy.

Submission deadline is Oct 20.

Conference is in DC on May 21, 2026.

More details below.

conference.nber.org/confsubmit/b...

Congrats from an Australia-loving academic!

just read the settlement is for $3k per title 😳

First time seeing people out protesting against the government and congress in Watkins Glen, NY

Just added my signature to the letter.

This is a no brainer.

It’s wild we’re having a conversation about US central bank independence in 2025. But here we are.

Please read and consider adding your signature.