They miss Baumol cost disease https://en.wikipedia.org/wiki/Baumol%27s_cost_disease https://en.wikipedia.org/wiki/Baumol%27s_cost_disease Basically there have

They miss Baumol cost disease https://en.wikipedia.org/wiki/Baumol%27s_cost_disease https://en.wikipedia.org/wiki/Baumol%27s_cost_disease Basically there haven't been major productivity increases in construction.