Using patent citation data for the U.S., we test whether knowledge spillovers in biotechnology are sensitive to distance. Controlling for self-citation by inventor, assignee and examiner, cohort-based regression analysis shows that spillovers are local but that distance is becoming less...

We investigate whether clusters and networks impact differently a firm's ability to generate technological innovations in a longitudinal study of US based semiconductor firms. We further examine whether resource profiles of firms explains their differential ability to benefit from the network...