Jonathan Colmer
@jmcolmer.bsky.social
2.7K followers 510 following 47 posts
Associate Professor at UVA Econ | Co-Founder & Director of the Environmental Inequality Lab | Environmental Econ, Growth & Dev, Labor, Public | PhD from LSE | 🇬🇧 in 🇺🇸 | www.jonathancolmer.com
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Reposted by Jonathan Colmer
voxdev.bsky.social
🆕 Do carbon offsets work? Evidence from the world’s largest offset programme

Today on VoxDev, Raphael Calel (Georgetown University), Jonathan Colmer (University of Virginia), Antoine Dechezleprêtre (OECD) & Matthieu Glachant (Mines Paris) outline research on India: voxdev.org/topic/energy...
Do carbon offsets work? Evidence from the world’s largest offset programme
Carbon offset programmes allow polluters to pay others to reduce emissions on their behalf. In theory, this can achieve the same emissions reductions at a lower cost, but only if the payment actually ...
voxdev.org
jmcolmer.bsky.social
Austin people, I'm in town Thursday until Monday evening. If anyone has interest in tennis, let me know!
jmcolmer.bsky.social
If there's room for one more :)
jmcolmer.bsky.social
Previous RAs have gone onto graduate programs at Columbia, Berkeley, and positions at the U.S. Census Bureau (you don't have to end up doing a PhD, a pre doc is a great way to find out if it's something you really want to do!)
jmcolmer.bsky.social
You'll be joining a growing team of other pre docs and RAs and other env econ researchers (@ajsw.info, currently at Stanford, and Jenna Anders, currently at Berkeley, are joining UVA too!) Heavy focus on mentoring and training. V competitive salary & lower cost of living.
Reposted by Jonathan Colmer
stevecicala.bsky.social
Welcome to the new arrivals. Here's a starter pack of Energy/Environmental economists to get you going:
bsky.app/starter-pack...
Reposted by Jonathan Colmer
seema.bsky.social
Thanks to @nberpubs.bsky.social for summarizing our study on payments for ecosystem services (PES). With a simple contract tweak, the cost to conserve additional forest thru PES plummeted. The cost per hectare shown here maps to permanently averting a ton of CO2 for <$5. www.nber.org/digest/20241...
jmcolmer.bsky.social
Brilliant, thanks Rei! We're certainly refining as we go and are happy to incorporate new ideas and suggestions to make them useful for decision-makers.
jmcolmer.bsky.social
And I forgot to add... because I'm still used to writing on Twitter where we did a longer thread earlier before Milton made landfall that provided this context, that this is work is in partnership with the EIF team at the U.S. Census Bureau led by @johnvoorheis.bsky.social!
jmcolmer.bsky.social
The population characteristics of those exposed to excessive rainfall and tropical storm-force winds were similar to the population that was forecasted to be exposed.
jmcolmer.bsky.social
Approximately 8.9 million people received more than 5 inches of rainfall within 24 hours, an amount high enough to trigger flash flooding. The affected population had a higher proportion of older, Hispanic, and low-income individuals, compared to national averages.
jmcolmer.bsky.social
Approximately 21.5 million people experienced tropical storm-force winds. The affected population had a higher proportion of older, Hispanic, non-Hispanic Black, and low-income individuals compared to national averages.
jmcolmer.bsky.social
The population exposed to hurricane-force winds included a larger share of Hispanic, non-Hispanic Black, under-18, and low-income individuals than the population that was forecasted to be exposed with a high probability.
jmcolmer.bsky.social
Approximately 3.6 million people were exposed to hurricane-force winds. The affected population had a higher proportion of older, Hispanic, and low-income individuals compared to national averages.
jmcolmer.bsky.social
Identifying who is exposed is crucial to developing targeted, efficient, and equitable responses. We have now finalized our post-landfall report for Hurricane Milton (took us longer than expected, but we'll be quicker next time).

www.environmental-inequality-lab.org/real-time-an...
jmcolmer.bsky.social
The Environmental Inequality Lab team have been working to build frameworks for real-time analysis of natural disasters and extreme weather events. The goal is to forecast vulnerability, identifying who, rather than just where, will be exposed.
jmcolmer.bsky.social
We're looking into highways in our analysis of mobility to see where people move. The benefit of what we're doing over the earlier work is that we data on individuals, where they live and their income. We're not relying on data on the characteristics of places, e.g., median income of a tract etc.
jmcolmer.bsky.social
Have you come across the wonder weeks? We found it was quite a cute for our two.
jmcolmer.bsky.social
We do analysis looking at variation in exposure throughout the wealth distribution as well as the income distribution and find very similar results. One way of thinking about the findings is that income/wealth isn't isn't sufficient to explain differences in exposure.
jmcolmer.bsky.social
Many questions remain! For example, it is possible, likely even, that income could affect env' quality in ways not captured in this study. e.g. aggregate increases in income for a community could affect env' quality through collective action. Someone should look into that.
jmcolmer.bsky.social
Taking the implied elasticity from this exercise, we recalculate that harmonizing the Black-White income gap would be associated with a 7% reduction in the Black-White pollution gap. Very similar to what was implied by the descriptive facts.