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*This page is referenced in the [[Patent Thicket Literature Review]]
*This page is listed on the [[PTLR Core Papers]] page
==Reference==
*Harhoff, D., Von Graevenitz, G. and Wagner, S. (2008), "Incidence and Growth of Patent Thickets-The Impact of Technological Opportunities and Complexity", CEPR Discussion Papers, Vol.6900
@article{harhoff2008incidence,
title={Incidence and Growth of Patent Thickets-The Impact of Technological Opportunities and Complexity},
author={Harhoff, D. and Von Graevenitz, G. and Wagner, S.},
journal={CEPR Discussion Papers},
volume={6900},
year={2008},
abstract={We investigate incidence and evolution of patent thickets. Our empirical analysis is based on a theoretical model of patenting in complex and discrete technologies. The model captures how competition for patent portfolios and complementarity of patents affect patenting incentives. We show that lower technological opportunities increase patenting incentives in complex technologies while they decrease incentives in discrete technologies. Also, more competitors increase patenting incentives in complex technologies and reduce them in discrete technologies. To test these predictions a new measure of the density of patent thickets is introduced. European patent citations are used to construct measures of fragmentation and technological opportunity. Our empirical analysis is based on a panel capturing patenting behavior of 2074 firms in 30 technology areas over 15 years. GMM estimation results confirm the predictions of our theoretical model. The results show that patent thickets exist in 9 out of 30 technology areas. We find that decreased technological opportunities are a surprisingly strong driver of patent thicket growth.},
discipline={Econ},
research_type={Empirical},
industry={},
thicket_stance={},
thicket_stance_extract={},
thicket_def={},
thicket_def_extract={},
tags={},
filename={Harhoff (2008) - Incidence And Growth Of Patent Thickets.pdf}
}
==File(s)==
*[[Media:Harhoff (2008) - Incidence And Growth Of Patent Thickets.pdf|Download the PDF]]
*[[:Image:Harhoff (2008) - Incidence And Growth Of Patent Thickets.pdf|Repository record]]
==Abstract==
We investigate incidence and evolution of patent thickets. Our empirical analysis is based on a theoretical model of patenting in complex and discrete technologies. The model captures how competition for patent portfolios and complementarity of patents affect patenting incentives. We show that lower technological opportunities increase patenting incentives in complex technologies while they decrease incentives in discrete technologies. Also, more competitors increase patenting incentives in complex technologies and reduce them in discrete technologies. To test these predictions a new measure of the density of patent thickets is introduced. European patent citations are used to construct measures of fragmentation and technological opportunity. Our empirical analysis is based on a panel capturing patenting behavior of 2074 firms in 30 technology areas over 15 years. GMM estimation results confirm the predictions of our theoretical model. The results show that patent thickets exist in 9 out of 30 technology areas. We find that decreased technological opportunities are a surprisingly strong driver of patent thicket growth.
Harhoff (2008) - Incidence And Growth Of Patent Thickets (view source)
Revision as of 16:33, 18 March 2013
, 16:33, 18 March 2013no edit summary
*This page is referenced in the [[Patent Thicket Literature Review]]
*This page is listed on the [[PTLR Core Papers]] page
==Reference==
*Harhoff, D., Von Graevenitz, G. and Wagner, S. (2008), "Incidence and Growth of Patent Thickets-The Impact of Technological Opportunities and Complexity", CEPR Discussion Papers, Vol.6900
@article{harhoff2008incidence,
title={Incidence and Growth of Patent Thickets-The Impact of Technological Opportunities and Complexity},
author={Harhoff, D. and Von Graevenitz, G. and Wagner, S.},
journal={CEPR Discussion Papers},
volume={6900},
year={2008},
abstract={We investigate incidence and evolution of patent thickets. Our empirical analysis is based on a theoretical model of patenting in complex and discrete technologies. The model captures how competition for patent portfolios and complementarity of patents affect patenting incentives. We show that lower technological opportunities increase patenting incentives in complex technologies while they decrease incentives in discrete technologies. Also, more competitors increase patenting incentives in complex technologies and reduce them in discrete technologies. To test these predictions a new measure of the density of patent thickets is introduced. European patent citations are used to construct measures of fragmentation and technological opportunity. Our empirical analysis is based on a panel capturing patenting behavior of 2074 firms in 30 technology areas over 15 years. GMM estimation results confirm the predictions of our theoretical model. The results show that patent thickets exist in 9 out of 30 technology areas. We find that decreased technological opportunities are a surprisingly strong driver of patent thicket growth.},
discipline={Econ},
research_type={Empirical},
industry={},
thicket_stance={},
thicket_stance_extract={},
thicket_def={},
thicket_def_extract={},
tags={},
filename={Harhoff (2008) - Incidence And Growth Of Patent Thickets.pdf}
}
==File(s)==
*[[Media:Harhoff (2008) - Incidence And Growth Of Patent Thickets.pdf|Download the PDF]]
*[[:Image:Harhoff (2008) - Incidence And Growth Of Patent Thickets.pdf|Repository record]]
==Abstract==
We investigate incidence and evolution of patent thickets. Our empirical analysis is based on a theoretical model of patenting in complex and discrete technologies. The model captures how competition for patent portfolios and complementarity of patents affect patenting incentives. We show that lower technological opportunities increase patenting incentives in complex technologies while they decrease incentives in discrete technologies. Also, more competitors increase patenting incentives in complex technologies and reduce them in discrete technologies. To test these predictions a new measure of the density of patent thickets is introduced. European patent citations are used to construct measures of fragmentation and technological opportunity. Our empirical analysis is based on a panel capturing patenting behavior of 2074 firms in 30 technology areas over 15 years. GMM estimation results confirm the predictions of our theoretical model. The results show that patent thickets exist in 9 out of 30 technology areas. We find that decreased technological opportunities are a surprisingly strong driver of patent thicket growth.
