September–October 2026
Agent Room
A home for projects that have more than one agent working on them.
Take a look →Projects and reading
Some things I’ve been working on, and a shelf of things to read.
On the desk
All projects →
September–October 2026
CityDrive for Cities: Skylines
Drive through the city you spent all that time building.
Take a look →
June 2026
Slay the Spire 2 simulator
A Spire fight you can take apart, rerun and argue with.
Take a look →
October 2026
Whale Watch
A million-dollar trade gets your attention. What should you make of it?
Take a look →Collection
10 entries
- A Geometric Calculator Inside a Neural NetworkArticle Read
- GearsArticle Proposed reading
- Mechanical WatchArticle Read
- On the Biology of a Large Language ModelPaper Read
- On the Impossibility of Informationally Efficient MarketsPaper Proposed reading
- Prospect TheoryPaper Proposed reading
- The Market for LemonsPaper Proposed reading
- The Nature of the FirmPaper Read
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July 2026Article
A Geometric Calculator Inside a Neural Network
GoodfireRead
Opening up a neural network to investigate a geometric calculation inside it, with the harder question close behind: is this a useful representation, or the mechanism doing the work?
Reading date not recorded.
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June 2026Article
Gears
Bartosz CiechanowskiProposed reading
Gear ratios are the easy part. Tooth shape is where the smooth motion comes from, and the moving diagrams make it much easier to see.
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June 2026Article
Mechanical Watch
Bartosz CiechanowskiRead
How a collection of springs, gears and tiny constraints manages to keep time. An explanation you can take apart one mechanism at a time.
Reading date not recorded.
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August 2026Paper
On the Biology of a Large Language Model
Lindsey and colleagues · AnthropicRead
Tracing some of the intermediate steps inside Claude 3.5 Haiku. The interesting test is whether changing a suspected circuit changes the behaviour it is meant to explain.
Reading date not recorded.
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October 2026Paper
On the Impossibility of Informationally Efficient Markets
Sanford J. Grossman and Joseph E. StiglitzProposed reading
If prices already told you everything, who would pay to find anything out? That tension is the starting point for the paper.
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August 2026Paper
Prospect Theory
Daniel Kahneman and Amos TverskyProposed reading
The same risky outcome can look different depending on where you start. Gains, losses and reference points turn out to matter a lot.
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September 2026Paper
The Market for Lemons
George A. AkerlofProposed reading
What happens to a market when the seller knows the quality and the buyer does not? Even trades that would help both sides can start to disappear.
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October 2026Paper
The Nature of the Firm
R. H. CoaseRead
If markets are so useful, why organise anything inside a firm? Coase starts with the costs of using the market itself.
Reading date not recorded.
Select a volume to read its notes.
Full collectionAbout
Maths and economics, with a fair number of software projects along the way.
A little more about me