In particular, that report considers substituting capital for labor a potential driver of explosive growth. Fen’s argument from the Baumol effect relies on the premise that there are baseline levels of labor that cannot be automated, and that productivity growth is therefore limited by those bottlenecks.
If Fen is using the most appropriate basic approach to forecasting growth, then his conclusions are correct.
Fen does not seem to be addressing the kind of models used in this OpenPhil report.
In particular, that report considers substituting capital for labor a potential driver of explosive growth. Fen’s argument from the Baumol effect relies on the premise that there are baseline levels of labor that cannot be automated, and that productivity growth is therefore limited by those bottlenecks.