Scholars examining the effect of knowledge spillovers on R&D and innovation all agree on one thing-there is a strong relationship between the firm's R&D effort and knowledge spillover. The sign of this relationship depends, however, on many things, such as the type of spillovers (horizontal,...

In this paper we integrate the insights of the Knowledge Spillover Theory of Entrepreneurship and Innovation (KSTE+I) with Schumpeter's idea that innovative entrepreneurs creatively apply available local knowledge, possibly mediated by Marshallian, Jacobian and Porter spillovers. In more detail,...