Sources of productivity growth

Productivity: the output produces with a given set of inputs (labor, capital, land?).
* Specialization
* Education
* Practice/skill
* Machine improvement/technology
* Process organization/simplification/clarity
* Resource reallocation/misallocation change (this is more at the economy-wide level)
*Factor utilization
== Sources ==
Nordhaus wrote a 3-paper series. see e.g. this.