In this paper we review 20 years of quantitative research in the geography of innovation, to whose advancement patent data have contributed in a decisive way. We know now that the importance attributed by the earliest studies to knowledge externalities as an agglomeration force was excessive....

This paper documents the influence of diaspora netw orks of highly-skilled individuals – i.e.,inventors – on international technological collaborations. Using gravity models, it studies the determinants of the internationalization of inventive activity between a group of industrialized...