This paper estimates production functions with factor interaction for annual US output from 1949 to 2013 including energy Btu input with capital and labor. Interactions between the three factors are parsimoniously introduced to the error correction estimates. The findings are as follows: Fixed...

We develop a theory of outsourcing in which there is market power in one factor market (labor) and no market power in a second factor market (capital). There are two intermediate goods: one labor-intensive and the other capital-intensive. We show there is always outsourcing in the market...