Specialisation, Diversity and Geographical Diffusion of Knowledge
نویسنده
چکیده
The paper seeks to develop our understanding of the somewhat diffuse nature of technological externalities in technological space by associating a geographical dimension with the sectoral dimension. Using panel data this paper estimates a knowledge production function that allows for spillovers inside the same industry and outside, and for local as well as global geographical spillovers. This allows to test wether inter-sectoral externalities would be more favoured by geographical proximity, while intra-sectoral externalities would be produced more easily at a distance. The results confirm this hypothesis for the French case, since Jacobs externalities decrease more drastically with distance than MAR externalities. A few keywords: Geographic spillovers, MAR externalities, Jacobs externalities JEL code(s): 031, R12
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