This paper suggests that the spillover of knowledge may not occur automatically as has typically been assumed in models of endogenous growth. Rather, a mechanism is required that serves as a conduit for the spillover and commercialization of knowledge from the source creating it to the firm...

The intellectual breakthrough contributed by the new growth theory was the recognition that investments in knowledge and human capital endogenously generate economic growth through the spillover of knowledge. Endogenous growth theory does not explain how or why spillovers occur. The missing link...