Lychagin, Sergey and Slade, Margaret E.
(2010)
Spillovers in space: does geography matter?
CEP Discussion Papers (CEPDP0991).
London School of Economics and Political Science. Centre for Economic Performance, London, UK.
Abstract
We simultaneously assess the contributions to productivity of three sources of research anddevelopment spillovers: geographic, technology and product - market proximity. To do this,we construct a new measure of geographic proximity that is based on the distribution of afirm's inventor locations rather than its headquarters, and we report both parametric and semiparametric estimates of our geographic-distance functions. We find that: i) Geographicspace matters even after conditioning on horizontal and technological spillovers; ii)Technological proximity matters; iii) Product-market proximity is less important; iv)Locations of researchers are more important than headquarters but both have explanatory power; and v) Geographic markets are very local.
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