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Title:Innovative activity in wind and solar technology: Empirical evidence on knowledge spillovers using patent data PDF Logo
Authors:Braun, Frauke G.
Schmidt-Ehmcke, Jens
Zloczysti, Petra
Issue Date:2010
Series/Report no.:Discussion papers // German Institute for Economic Research 993
Abstract:This paper studies technological change in renewable energies, providing empirical evidence on the determinants of innovative activity with a special emphasis on the role of knowledge spillovers. We investigate two major renewable energy technologies - wind and solar - across a panel of 21 OECD countries over the period 1978 to 2004. Spillovers may occur at the national level, either within the same technology field or economic sector (intra-sectoral spillovers) or in related technologies or sectors (inter-sectoral spillovers), or at the international level. We find that innovation is strongly driven by knowledge spillovers, especially those occurring at the national level. Wind and solar technologies exhibit distinct innovation characteristics: both are stimulated by intra-sectoral spillovers, but respond differently to inter-sectoral spillovers, which are only influential in the case of wind technology. We also find evidence that public R&D stimulates innovation, particularly in solar technologies.
Subjects:Technological change
renewable energy
patents
knowledge spillover
climate change
innovation
JEL:O31
Q42
Q55
Document Type:Working Paper
Appears in Collections:Publikationen von Forscherinnen und Forschern des DIW
DIW-Diskussionspapiere

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