Ariel Ortiz-Bobea's Avatar

Ariel Ortiz-Bobea

@arielob

Applied econ & policy prof at Cornell. Researching how people cope w/ environmental change. Posts about climate, agriculture, environment & academia. https://arielortizbobea.github.io

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Latest posts by Ariel Ortiz-Bobea @arielob

Please share with potential solid candidates for this postdoc (academicjobsonline.org/ajo/jobs/31576). We start reviewing application next week!

A data-savvy economist or data scientist with interest in agriculture and environment would be a good fit.

12.02.2026 21:39 πŸ‘ 6 πŸ” 7 πŸ’¬ 0 πŸ“Œ 0
Cornell University, College of Business Job #AJO31576, Postdoctoral Associate, Cornell University, College of Business, Cornell University, Ithaca, New York, US

academicjobsonline.org/ajo/jobs/31576

12.02.2026 21:36 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
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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.

16.01.2026 22:32 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

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!

16.01.2026 21:30 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

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.

16.01.2026 21:30 πŸ‘ 1 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

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).

16.01.2026 21:30 πŸ‘ 0 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

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 (Ξ”E) stem from increases in productivity (Ξ”(Y/X)) rather than reductions in input emission intensity (Ξ”(E/X)).

16.01.2026 21:30 πŸ‘ 1 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

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

Ξ”E = Ξ”Y + Ξ”(E/X) - Ξ”(Y/X)

16.01.2026 21:30 πŸ‘ 1 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0
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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...

16.01.2026 21:30 πŸ‘ 6 πŸ” 2 πŸ’¬ 2 πŸ“Œ 0

Like boiling frogs

16.01.2026 19:31 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

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!

14.01.2026 21:05 πŸ‘ 10 πŸ” 11 πŸ’¬ 1 πŸ“Œ 1

What can she see that everyone can see?

20.12.2025 01:39 πŸ‘ 3 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

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

11.12.2025 03:00 πŸ‘ 1 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

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

02.12.2025 17:13 πŸ‘ 7 πŸ” 2 πŸ’¬ 0 πŸ“Œ 0

Proper use of a bar chart

01.12.2025 22:54 πŸ‘ 10 πŸ” 2 πŸ’¬ 1 πŸ“Œ 0

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!

27.11.2025 21:01 πŸ‘ 17 πŸ” 4 πŸ’¬ 1 πŸ“Œ 0
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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!

27.11.2025 02:28 πŸ‘ 67 πŸ” 29 πŸ’¬ 1 πŸ“Œ 4

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 β€œfound” to be true.

25.11.2025 03:24 πŸ‘ 4 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

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

25.11.2025 00:21 πŸ‘ 20 πŸ” 6 πŸ’¬ 0 πŸ“Œ 1

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.

25.11.2025 00:15 πŸ‘ 5 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
Economics Job Market Update: November 2025 - A Historic Low

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...

24.11.2025 15:53 πŸ‘ 50 πŸ” 20 πŸ’¬ 7 πŸ“Œ 6

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?

25.11.2025 00:09 πŸ‘ 4 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

πŸ“’ Just accepted in #JAERE πŸ“’ is now posted at @aereorg.bsky.social!
πŸ“ Follow @aereorg.bsky.social to stay updated on all things REEP and JAERE.
#EconSky πŸ“ˆπŸ“‰

13.11.2025 13:02 πŸ‘ 1 πŸ” 1 πŸ’¬ 0 πŸ“Œ 0

Enough time for catcher to take a selfie

28.10.2025 03:58 πŸ‘ 1 πŸ” 1 πŸ’¬ 0 πŸ“Œ 0

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

28.10.2025 03:00 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

β€œIf you can afford it”

20.10.2025 14:22 πŸ‘ 2 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
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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.

22.09.2025 14:42 πŸ‘ 1570 πŸ” 542 πŸ’¬ 36 πŸ“Œ 23
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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...

11.09.2025 19:15 πŸ‘ 25 πŸ” 22 πŸ’¬ 1 πŸ“Œ 2

Congrats from an Australia-loving academic!

09.09.2025 23:27 πŸ‘ 2 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

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

06.09.2025 13:55 πŸ‘ 2 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0