sectors (inter-sectoral spillovers), or at the international level. We find that innovation is strongly driven by knowledge … innovative activity with a special emphasis on the role of knowledge spillovers. We investigate two major renewable energy … spillovers, especially those occurring at the national level. Wind and solar technologies exhibit distinct innovation …

OECD member countries and 2 non-member countries. As countries differ in their national innovation systems and states of …-Saxon countries, the measurement of R&D efficiency needs to consider differences in the technology of knowledge production. The … account for country-specific heterogeneity. This paper models technological differences in knowledge production among …