We need practice building tractors

What about Capital?

In his post this morning, co-blogger Bryan Caplan attributes increased worker productivity to two factors:1. Practice.2. Management.I think he's right that these are quite important, but I think he's left out a more-important factor: the growth of capital per worker.

I dunno what capital is, but we practice making it in the practice yard. We normally call the practice yard a school. 

It all started when we stood up and threw a rock leading to the stone age which is the dominant shock. That leads to inventory and repeated trials. What we call capital is really value added chain between inventory points.