?How do firms reach out to foreign universities? Inventors? personal characteristics and the multinational structure of firms?

We analyze the determinants of firm-based inventors' collaborations with universities abroad, comparing them with collaborations with national universities. We propose a micro-founded theoretical framework that in-troduces the role of personal linkages and global organizational pipelines as drivers of international academic collaborations, and we empirically investigate collaborations with national and international universities in a sample of inventors in Italy. We find that in general international collaborations depend positively on inventors working for multinational enterprises (MNEs). Instead for collaborations with national universities, the personal local linkages of the inventors play a large role. However, we also find that for collaborations with very distant universities abroad, such as US ones, working for an MNE is less crucial and the personal linkages of inventors become more important. In this case being an inventor with a network of foreign colleagues and with greater acquaintance with the norms of open science facilitates the interaction. This applies also to inventors who work for MNEs. The results point to a hybrid model of global linkages in the case of collaborations between firms and universities, in which both the personal international linkages of the inventors and the global organizational pipelines of MNEs play an important role.