This study aims at unpacking the internal R&D determinants spurring a firm to invest in R&D abroad, that is owning R&D performing affiliates abroad. Differently from previous literature – mainly focusing on country level determinants as well as on motivations for the location choice of foreign R&D – we make a shift in the observation point. In particular, we dig deeper into the characteristics of firms' intra-mural R&D and the different types of R&D outsourcing to assess their association with R&D internationalisation. On the one hand, we account for the different types of R&D employees (share of researchers and technicians on R&D employees) and R&D performance (basic versus applied research; R&D ...