And in the type of work where AI arguably yields productivity gains the workers have high agency and may pay for their own tooling without telling their employers. Case in point, me, I have access to CoPilot via my employer but don't use it because I prefer my self-paid ChatGPT subscription. If Ai-lift in productivity is measured on the condition that I use Copilot then the resulting metric misses my AI usage entirely and my productivity improvement are not attributed to their real cause.