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John Parsons

@johnparsons.bsky.social
1.1K followers 232 following 174 posts

Financial economist at MIT working on energy, environment and risk. Used to have a great crystal ball, but it's now in for repairs. Image: Barlach's Reader www.mit.edu/~jparsons

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Reposted by John Parsons
bikebike @bikebikeyyc.bsky.social · 10/09/2026
Wrote a thing that has been bugging me for a very long time smcarter1.substack.com/p/no-bike-sh...
smcarter1.substack.com
No, Bike Shops Shouldn’t Have to Fix Every E-Bike
There may be millions of unsupported e-bikes looking for someone to fix them. That doesn’t mean independent bike shops are stupid for saying no.
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John Parsons @johnparsons.bsky.social · 30/08/2026
If all it did was give us Spuford’s Red Plenty, it would be worth it.
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John Parsons @johnparsons.bsky.social · 30/06/2026
Thanks for your work. …and for sharing your FLOOF.
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John Parsons @johnparsons.bsky.social · 29/06/2026
Campaigning is a job Biden manifestly could not do. We Dems undermined ourselves telling people not to believe their own eyes.
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John Parsons @johnparsons.bsky.social · 27/06/2026
Sounds like a plan!
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Reposted by John Parsons
MIT Center for Energy and Environmental Policy Research @mitceepr.bsky.social · 08/06/2026
A recording of last week's webinar on "The Economics of Keeping Diablo Canyon Online" by @johnparsons.bsky.social is now available at the link below: youtu.be/cUdPZUZz-Ow
youtu.be
20260604 CEEPR Webinar: The Economics of Keeping Diablo Canyon Online
YouTube video by MIT CEEPR
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John Parsons @johnparsons.bsky.social · 07/06/2026
Thanks. Look forward to hearing more in due course.
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John Parsons @johnparsons.bsky.social · 07/06/2026
Isn’t this the argument for micro foundations?
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Reposted by John Parsons
MIT Climate Policy Center @mitclimatepolicy.bsky.social · 03/06/2026
As California lawmakers weigh whether to extend Diablo Canyon beyond 2030, new MIT Sloan research finds that keeping the plant online through 2045 could save ratepayers billions while supporting a renewables-dominated grid. Join MIT CEEPR's John Parsons. 📅 June 4 | 🕒 3–4 PM EST 🔗 buff.ly/FiMBZe7
buff.ly
Webinar 6/4: The Economics of Keeping Diablo Canyon Online
As California lawmakers consider whether to extend Diablo Canyon beyond 2030, join MIT's John Parsons for a discussion of new research assessing the plant's potential impacts on electricity costs, grid reliability, and the state's clean energy transition.
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John Parsons @johnparsons.bsky.social · 26/05/2026
Lies, damn lies, and statistics. The author knows this number is only half the story, but trumpets it anyway. Yes, that’s the marginal energy price. And what about the average all in price, inclusive of tax subsidies? Why do you re-trumpet this stuff?
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John Parsons @johnparsons.bsky.social · 10/05/2026
This seems to overlook other sources of revenue, such as the capacity market and government subsidies. Capacity markets are explicitly intended to cover the missing money when energy revenue is less than the cost of new entry (CONE).
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John Parsons @johnparsons.bsky.social · 21/04/2026
Just released a new analysis of "The Economics of Continued Operation of the Diablo Canyon Nuclear Power Plant, 2030-2045" While the NRC renewed the license, the state of California still needs to approve continued operation. ceepr.mit.edu/wp-content/u...
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John Parsons @johnparsons.bsky.social · 18/04/2026
True
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Reposted by John Parsons
Catherine Wolfram @cwolfram.bsky.social · 15/04/2026
A 🧵on two of my all-time favorite charts. The 1st, just published by the @iea.org in the “State of Energy Policy 2026” report shows that more than half of industrial CO2 emissions are now covered by carbon pricing. Reports linked below.
The share of industrial emissions covered by a carbon price increased dramatically in 2025 to 58%.
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John Parsons @johnparsons.bsky.social · 14/04/2026
Because I was a consultant for 10 years I chuckle anytime someone speaks about setting up a Chinese Wall to avoid a conflict. Not the same, but hopefully you get my point.
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John Parsons @johnparsons.bsky.social · 22/03/2026
Thank you
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John Parsons @johnparsons.bsky.social · 11/03/2026
I dug out two spots in addition to my own. A neighbor who parked in one put their own cone there!
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John Parsons @johnparsons.bsky.social · 10/03/2026
I’m very impressed when the billionaire’s are disappointed with the little people trying to manage their financial security.
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Reposted by John Parsons
MIT Center for Energy and Environmental Policy Research @mitceepr.bsky.social · 09/03/2026
Electric vehicle adoption is a key part of climate and transportation goals, and local policies can make a big difference. One such policy is allowing EVs to use high-occupancy vehicle lanes even with a single driver. A new paper examines how these exemptions affected EV adoption ceepr.link/4qV4veK
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Reposted by John Parsons
MIT Climate Policy Center @mitclimatepolicy.bsky.social · 27/02/2026
In the NYT, our Faculty Director Christopher Knittel weighs in on data center policy — from on-site power to moratoriums. Get it right, and we support the grid + AI growth. Get it wrong, and costs rise. Policy brief: buff.ly/VyIYRum NYT: buff.ly/eoXJ9rx
buff.ly
Data Center Temporal Flexibility Policy Brief - MIT Climate Policy Center.pdf
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John Parsons @johnparsons.bsky.social · 07/03/2026
Make the audit happen,now. Stop with excuses. That was an earlier era of Democrats.
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Reposted by John Parsons
Jeremy C-howl @jmchao.bsky.social · 01/03/2026
FIFA has officially issued President Trump a yellow card. If he assassinates another world leader, it’ll become an automatic red card and he won’t be eligible for another FIFA Peace Prize for 4 years.
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John Parsons @johnparsons.bsky.social · 21/02/2026
I remember Andrew 8 8000.
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John Parsons @johnparsons.bsky.social · 21/02/2026
Andrea was my neighbor in Dot and a good follow… oh, and the Mass Attorney General, too.
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John Parsons @johnparsons.bsky.social · 21/02/2026
Greetings from Dot. Collected my first signature for you today. Give a thought to aiding the audit of the statehouse that Massachusettts voters supported overwhelmingly.
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John Parsons @johnparsons.bsky.social · 16/02/2026
There are certainly people who are too credulous of model results. But in my opinion the more significant problem is getting modelers to speak clearly about problems as non-modelers conceive of them. Then the results go nowhere.
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John Parsons @johnparsons.bsky.social · 16/02/2026
It’s an organized and disciplined way of thinking and describing tradeoffs, constraints, policies and consequences. Very valuable whatever you call it.
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Reposted by John Parsons
MIT Center for Energy and Environmental Policy Research @mitceepr.bsky.social · 03/02/2026
For a number of years, a debate has been brewing concerning the best way to report on the indirect emissions from the generation of purchased electricity. Check out a new Research Commentary by @johnparsons.bsky.social on the topic: ceepr.link/4rs0Rtp
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John Parsons @johnparsons.bsky.social · 27/01/2026
Thank you. Well explained.
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John Parsons @johnparsons.bsky.social · 16/01/2026
Nice to see the power start flowing. www.wbur.org/news/2026/01...
wbur.org
A decade in the making, clean energy power line for Mass. is up and running
A major new transmission line that can bring renewable electricity from Quebec to Massachusetts is finally, after a whole lot of controversy and delay, starting to deliver power.
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John Parsons @johnparsons.bsky.social · 30/10/2025
Important dive into the politics and VCs behind micro reactors. www.bloomberg.com/news/feature...
bloomberg.com
The Risky Movement to Make America Nuclear Again
A Silicon Valley startup called Oklo is leading the charge to bring nuclear power back to the US with small reactors. Its backers have wealth and political connections that could undermine nuclear saf...
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John Parsons @johnparsons.bsky.social · 11/10/2025
People are right to be angry. The country is in crisis, and the country's leadership is proving terribly inept, especially Dem leadership. It's not right for that anger to be channeled as personal attacks. But as Frederick D said, when we need the rain, we should also expect some thunder.
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John Parsons @johnparsons.bsky.social · 11/10/2025
Because his job is not to advance the body of the Democratic Party, but to protect Gov Healey's electoral org, and he sees the former as only a potential nuisance to the latter.
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John Parsons @johnparsons.bsky.social · 11/10/2025
Age is the obvious moment of contention, but it's not the root complaint. Here in MA, the State Party chair attempted to liquidate one of the few remaining remnants of a grass root org, the annual convention. Why?
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John Parsons @johnparsons.bsky.social · 11/10/2025
Their failure is a black mark against them as future leaders: unable to speak up for the interest of their party or their country because they wanted to preserve the easiest path for their own electoral futures.
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John Parsons @johnparsons.bsky.social · 11/10/2025
Biden's decision to run was classic tragedy. Worse yet was the fact that almost NONE of the rest of the leadership spoke out in opposition. Polls showed the American public seriously questioned Biden's age, but no elected Dem dared address the issue honestly.
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John Parsons @johnparsons.bsky.social · 11/10/2025
Any sensible org or business considers the age of its leadership as it plans for its future. But the Dem establishment has devolved into a Linked-In networking op for its electeds. They don't look out for the interest of the body over the success of the individuals.
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John Parsons @johnparsons.bsky.social · 11/10/2025
There should be no place for vitriol, and none for ageism either. That said, I think we can understand the seething anger produced when egotism steps in front of the interests of the country. We've seen that in spades from Dem leadership.
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John Parsons @johnparsons.bsky.social · 05/08/2025
So sorry for your loss. Thank you for sharing the beautiful photo. Adorable.
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John Parsons @johnparsons.bsky.social · 31/07/2025
Yes, let’s us be serious even as they’re not. Really.
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John Parsons @johnparsons.bsky.social · 30/05/2025
Why? The point is that RGGI is a distraction. States have pursued decarb by other means. Focus there.
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John Parsons @johnparsons.bsky.social · 29/05/2025
Yep
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John Parsons @johnparsons.bsky.social · 29/05/2025
My conjecture…small change on the margin, and slightly lower wholesale prices. Perhaps someone has done the study?
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John Parsons @johnparsons.bsky.social · 29/05/2025
RGGI is almost never the relevant constraint on fossil gen, but tons of academics give it attention. Here in MA we have strict quantity caps on gas gen. But we can buy unlimited electrons from NH.
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John Parsons @johnparsons.bsky.social · 28/05/2025
Started out as a recommendation to read. Ended as a rec not to. Hmmmmm?
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John Parsons @johnparsons.bsky.social · 20/05/2025
I have grave doubts about the chance of being an export powerhouse that doesn’t build at home.
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John Parsons @johnparsons.bsky.social · 18/05/2025
Well said
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John Parsons @johnparsons.bsky.social · 13/05/2025
My experience teaching at CUNY in the 1990s,too.
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John Parsons @johnparsons.bsky.social · 10/05/2025
This was once true, but no longer. gabriel-zucman.eu/policy-debat...
gabriel-zucman.eu
Debates | Gabriel Zucman
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John Parsons @johnparsons.bsky.social · 03/04/2025
Same as a parent’s job, just narrower in scope.
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