Externalités de connaissance et localisation des activités : une revue des analyses empiriques

This article studies the nature of the links between innovation, technological spillover (in the sens of knowledge spillover), localization and economies of agglomeration. The theorical links are already instituted between the two disciplinary fields of economy of innovation and spatial economy. So we try to examine methods and indicators of empirical studies who allow to cross these two fields. We demonstrate that they are complementary and to cross them permits to better understand how the exchange of information and knowledge play a part in the formation of agglomeration?s economies. Particularly we can introduce new variables like sectorial differencies, the technological profile of firm and the competitive characteristics. Classification JEL : D62, D2, R12.