Productivity in knowledge work is not difficult to measure, just very laborious. A few aspects need to be untangled to do it, though. Goodhart's law [1] is an

Productivity in knowledge work is not difficult to measure, just very laborious. A few aspects need to be untangled to do it, though. Goodhart's law [1] is an adage often stated as, "When a measure becomes a target, it ceases to be a good measure". It is named after British economist Charles Goodhart, who is credited with expressing the core idea of the adage in a 1975 article on monetary policy in the United Kingdom: Any observed statistical regularity will tend to collapse once pressure is placed upon it for control purposes. 1. https://en.m.wikipedia.org/wiki/Goodhart's_law https://en.m.wikipedia.org/wiki/Goodhart's_law