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2020-09-29T23:14:56Z
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Maintenance script at 17:23, 29 September 2020
2020-09-29T17:23:02Z
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<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">}}</ins></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>*This page is referenced in the [[Patent Thicket Literature Review]]</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>*This page is referenced in the [[Patent Thicket Literature Review]]</div></td></tr>
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Ed
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imported>Ed: 1 revision
2013-03-19T23:17:32Z
<p>1 revision</p>
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imported>Ed
http://www.edegan.com/mediawiki/index.php?title=Harhoff_(2008)_-_Incidence_And_Growth_Of_Patent_Thickets&diff=31754&oldid=prev
imported>Ed at 21:33, 18 March 2013
2013-03-18T21:33:37Z
<p></p>
<p><b>New page</b></p><div><br />
*This page is referenced in the [[Patent Thicket Literature Review]]<br />
*This page is listed on the [[PTLR Core Papers]] page<br />
<br />
==Reference==<br />
<br />
*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<br />
<br />
@article{harhoff2008incidence,<br />
title={Incidence and Growth of Patent Thickets-The Impact of Technological Opportunities and Complexity},<br />
author={Harhoff, D. and Von Graevenitz, G. and Wagner, S.},<br />
journal={CEPR Discussion Papers},<br />
volume={6900},<br />
year={2008},<br />
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.},<br />
discipline={Econ},<br />
research_type={Empirical},<br />
industry={},<br />
thicket_stance={},<br />
thicket_stance_extract={},<br />
thicket_def={},<br />
thicket_def_extract={}, <br />
tags={},<br />
filename={Harhoff (2008) - Incidence And Growth Of Patent Thickets.pdf}<br />
}<br />
<br />
==File(s)==<br />
<br />
*[[Media:Harhoff (2008) - Incidence And Growth Of Patent Thickets.pdf|Download the PDF]]<br />
*[[:Image:Harhoff (2008) - Incidence And Growth Of Patent Thickets.pdf|Repository record]]<br />
<br />
==Abstract==<br />
<br />
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.</div>
imported>Ed