We study the prevalence and traits of global collaborative patents for U.S. public companies, where the inventor team is located both within and outside of the United States. Collaborative patents are frequently observed when a corporation is entering into a new foreign region for innovative...

Die Innovationskraft von Forschungsleistungen wird oft an Inputs wie Forschungsmitteln oder Outputs wie Patentanmeldungen gemessen. Hier wird ein neuartiger Indikator für pharmazeutische Innovationskraft vorgestellt, der sich auf die weltweiten medizinischen Durchbrüche und die assoziierten...

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...

As a first step towards understanding the evolution of small groups in firms, this paper develops and tests a simple decision-theoretical model of research-unit evolution in which, as managers resolve their uncertainty over time, they shut down under-performing units and remove under-performing...

In recent years, cities have become increasingly interested in their ability to generate, attract and retain human capital. One measure of human capital is employment in science and engineering-based occupations. This paper provides a comparison of the employment shares of these specialized...