Knowledge Spillovers in the Solar energy sector

PublikationWorking paper
Patent, Research and Development, solar power, Spillovers
Working Paper 351.Solar Spillover.JG
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The purpose of this paper is to provide an analysis of the existence and possible direction of international knowledge spillovers in the solar energy sector. Specifically, the paper investigates how the accumulation of solar energy patents and public R&D spending affected the output of domestic granted solar energy patents. The econometric analysis relies on a data set consisting of most of the OECD countries plus China and analyzes two time periods; from 1990 to 2014 and the years 2000 to 2014. To analyze the data material, a Poisson fixed-effects estimator based on the Hausman, Hall and Griliches (1984) method was used. The empirical findings suggest that the domestic accumulation of patents and R&D is important for the potential development of new ones. Indeed, early investment in specific technology can be an indicator of future leadership in that field.

Grafström, J. (2021). Knowledge Spillovers in the Solar energy sector. Ratio Working Paper No. 351. Stockholm: Ratio.

Liknande innehåll

University Knowledge Spillovers & regional start-up rates
Artikel (med peer review)Publikation
Hellerstedt, K., Wennberg, K. & Fredriksen, L.



This chapter investigates how regional start-up rates in the knowledge-intensive services and high-tech industries are influenced by knowledge spillovers from both universities and firm-based R&D activities. Integrating insights from economic geography and organizational ecology into the literature on entrepreneurship, we develop a theoretical framework which captures how both supply- and demand-side factors mold the regional bedrock for start-ups in knowledge-intensive industries. Using multilevel data of all knowledge-intensive start-ups across 286 Swedish municipalities between 1994 and 2002 we demonstrate how characteristics of the economic and political milieu within each region influence the ratio of firm births. We find that knowledge spillovers from universities and firm-based R&D strongly affect the start-up rates for both high-tech firms and knowledge-intensive services firms. Further, the start-up rate of knowledge-intensive service firms is tied more strongly to the supply of university educated individuals and the political regulatory regime within the municipality than start-ups in high-tech industries. This suggests that knowledge-intensive service-start-ups are more susceptible to both demand-side and supply-side context than is the case for high-tech start-ups in general. Our study contributes to the growing stream of research that explains entrepreneurial activity as shaped by contextual factors, most notably academic institutions, such as universities that contribute to knowledge-intensive start-ups.

Related content: Working Paper No. 230

Service-sector competition, innovation and R&D
Artikel (med peer review)Publikation
Karpaty, P. & Gustavsson Tingvall, P.



The central prediction of the Aghion, Bloom, Blundell and Howitt model is an inverted U-shaped relationship between innovation and competition. The model is built on the assumption of a product market and has not yet been tested on the service sector. Using detailed firm-level data on Swedish service-sector firms, we find evidence of an inverse U-shaped relationship for exporting service-sector firms. A further breakdown of innovation expenditures shows that the inverse U-shaped pattern holds for intramural R&D and training, but not for extramural R&D. Finally, the results indicate that as competition increases, small firms tend to seek strategic alliances with competitors, whereas large firms tend to reduce collaboration with competitors. The behavior of large firms can partly be due to their superior capacity to handle innovation projects internally, which will become more important if increased competition results in higher pay-offs to innovation.

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