Bottazzi, Laura; Peri, Giovanni - 2000
recently by the theoretical and empirical literature. Moreover the intensity of knowledge externalities in generating … output to R&D employment is around 1, while knowledge externalities exist, are geographically localized in an area of 200 kms … European regions' innovative activity is better represented by a model as Jones (1995) than by one as Romer (1990). Knowledge …