Bry the Numbers

Karpathy's AI Jobs Heat Map with Real Employment and Salary Data

Karpathy's AI Jobs Heat Map with Real Employmen...

Interactive visualization of 342 occupations showing BLS projected outlook, AI exposure risk, and actual employment and salary changes from Bureau of Labor Statistics data. Updated daily. The title namedrops Karpathy...

Karpathy's AI Jobs Heat Map with Real Employmen...

Interactive visualization of 342 occupations showing BLS projected outlook, AI exposure risk, and actual employment and salary changes from Bureau of Labor Statistics data. Updated daily. The title namedrops Karpathy...

Mix effects illustration

When Metrics Move, Is It Behavior or Mix?

When an aggregate metric moves, is it because behavior changed or because the composition of traffic shifted? A simple three-term decomposition answers this precisely — and it's the most underrated...

When Metrics Move, Is It Behavior or Mix?

When an aggregate metric moves, is it because behavior changed or because the composition of traffic shifted? A simple three-term decomposition answers this precisely — and it's the most underrated...

Compounding Knowledge vs Compounding Errors

Experiments Are a Durable Moat

AI collapses the cost of building. It does not collapse the cost of being wrong. Experimentation is the mechanism that converts speed into learning.

Experiments Are a Durable Moat

AI collapses the cost of building. It does not collapse the cost of being wrong. Experimentation is the mechanism that converts speed into learning.