Nothing here is investment advice but if you're thinking about the SpaceX/Twitter/Grok IPO at a planned $1.75 trillion valuation, I've got some thoughts on how you can model the shape and depth of the first settlement on Mars

"Powerful AI can statically help human decision-makers, but can harm collective knowledge building... it can lead to what we call “knowledge collapse” whereby in the long-run all human knowledge is ultimately destroyed.” economics.mit.edu/sites/defaul...

I'd estimate ~20% of cars stop for the trail crossing I use to bike home. Bring on the robots.

Hard to convey what an achievement this is. Go Bodhana!

I gave @bengolub.bsky.social's refine.ink a try on my remaining thesis chapter I'm trying to figure out what to do with and to be frank it gave exceptional feedback If you're interested in using it, here's a link that earns us both a free review after 1st purchase www.refine.ink?ref=bS5tdXJw...

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Some valid points here, but note the "American" qualifier to mask the fact that Tesla isn't at the frontier of anything.

Had to give it a try

Recently accepted by #QJE: “The Macroeconomic Impact of Climate Change: Global Versus Local Temperature,” by Bilal (@adrienbilal.bsky.social) and Känzig (@dkaenzig.bsky.social): doi.org/10.1093/qje/...

IPO ~ AGI

Carpenter & co-authors find lower earnings associated with respondents who identify as trans or nonbinary using national census data from Canada #EconSky

You should pay attention when Richard talks shi...fts in emissions estimates

As a rare climate scientist working in Silicon Valley, I've been drinking from the AI firehose a lot more than my peers. I thought it would be helpful to lay out my experiences of both the promise and pitfalls of using AI to accelerate scientific research:

I'm using Claude Code with Rstudio. Two constraints: - Have to use Windows (no VMs/docker etc) - Need to be able to sandbox to specific directories Currently I'm running Claude in WSL with Ubuntu set to a project sub-directory, then running the R code in Windows. Any suggested improvements?

Deadline this week! #econsky #econconf

some thoughts on openai's letter to the house 1) i think openai is trying to position itself as a national champion for ai and get state support for the ai infrastructure buildout

A view we will not soon forget. The Blizzard of 2026.

What is the best movie that's set on a farm?

Read the Abstract of this New paper by Bilal and Känzig “The Macroeconomic Impact of Climate Change: Global Versus Local Temperature”👇

"distillation attacks" is an interesting choice of term

My favourite bit of traitors is the level of protective equipment they wear to go in the loch.

Spent 4 hours manning a girl scout cookie booth today and man what a positive experience. Really grateful to live in such a diverse and kind community of people.

A maternity ward doctor donated his own blood during surgery to keep a pregnant patient alive. One woman gained fewer than 10 pounds over her entire pregnancy. Another collapsed and had seizures during labor. (Published Dec. 2025)

Eradicating child stunting was a central feature of the modern health transition. A new paper reviews 923 child growth studies in 122 countries 1814-2016 to show massive decline in child stunting in the 20th century even in hi income countries & surprising heterogeneity in the regional trajectories.

Good summary of options for replacing the IEEPA tariffs.

Any informed folk know what this means for tariffs already paid?

Tariffs ruling just dropped: The court holds that IEEPA does not authorize the president to impose the tariffs.

Once again: 1) Increased CO2 raises global temperature 2) Increased CO2 raises the rate of photosynthesis The negative effects on crop yields of (1) are bigger than the positive effects of (2).

Asking Claude to speed up code but not spend too much time on it and accidentally rediscovering the halting problem

The mission documents: "[T]argeting linked to ethnicity, gender, and perceived political affiliation, resulting in mass killings, serious bodily and mental harm, widespread rape and other forms of sexual violence, arbitrary detention, torture and cruel treatment, and enforced disappearances"

tried utilmaxxing but got paretomogged

As pressure mounts on global seafood systems, innovation is accelerating to help meet growing demand in more sustainable ways. In that spirit, Atlantic Fish Co. + Revo Foods have teamed up to create whole-cut fish fillets that combine mycoprotein scaffolding with cell-cultured proteins.

Today in Lysenkoism

I'm a bit late to it, but this is a careful look at how we can start thinking about the implications of transformers for economic modelling #EconSky

‘Well, look, if I’m going to import the cars anyway, then I’d rather import less oil. We may as well import the one that cleans up local air quality and is cheaper to buy.’ The Great Story of the Extraordinary EV boom in Ethiopia www.bloomberg.com/news/feature...