entrepreneurship literature is that opportunities are exogenous, the most prevalent theory of innovation in the economics literature … opportunity by developing a knowledge spillover theory of entrepreneurship. The basic argument is that knowledge created … endogenously via R&D results in knowledge spillovers. Such spillovers give rise to opportunities to be identified and exploited by …

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 is the mechanism converting knowledge into economically relevant …

dirty innovation and production; (ii) optimal policy involves both .carbon taxes. and research subsidies, so that excessive … the switch to clean innovation under laissez-faire when the two inputs are substitutes. Under reasonable parameter values …

routinized phase where innovation takes place within top-performing incumbents; (3) a second entrepreneurial phase characterized … routinization, in which no further innovation takes place, but is instead a phase of structural change. Using data on 74 West German …

industry life cycle. The theory of knowledge spillovers, based on the knowledge production function for innovative activity …, suggests that geographic proximity matters most in industries where tacit knowledge plays an important role in the generation … of innovative activity. According to the emerging literature on the industry life cycle, tacit knowledge plays the most …