CONCEPT
Efficiency vs. Intensity
The critical analytic distinction the productivity metric cannot detect: an efficiency gain produces more output with less effort, while an intensity gain produces more output with the same hours but more cognitive expenditure per hour — the first is sustainable, the second is borrowed.
The traditional productivity metric divides output by labor input. When output doubles and hours remain constant, productivity appears to double. The metric is simple, tractable, and almost universally employed. It is also blind to a distinction that the AI transition makes critical. An efficiency gain means producing the same output with less effort — the process improves, cognitive load per unit of output decreases, and the worker goes home at the same time having accomplished more. This gain is sustainable. An intensity gain means producing more output with the same hours but more effort per hour — cognitive load increases, decision density rises, and every minute contains more thinking than the minute before. This gain is not sustainable without recovery structures that the AI-augmented workplace systematically lacks.
In The You On AI Field Guide
The productivity metric cannot distinguish between these two sources of improvement. A worker who produces