Here's something esoteric that I didn't know:
Even as overall productivity has risen 34% (since 1987), capital productivity has declined 15%. And it's not just the US:
Capital productivity has plummeted across all rich countries. In the food and construction sectors it's down more than 50%. In other sectors it's down 30%, and only in IT is it up.
Why? Remember the investment drought we talked about frequently during the financial panic? Another term for that is capital glut, and we still have it. There's so damn much capital sloshing around the world that it's become super abundant compared to labor—and since abundant inputs are inherently the least productive, capital productivity has suffered. Lenders are eager to lend and even mediocre projects get funded, driving down the overall average.
Does this matter? There's the rub: I don't know. But no one seems to be very concerned about it, so. . .