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Technological Relatedness and Knowledge Space: Entry and Exit of US Cities from Patent Classes
Rigby D. L. Technological relatedness and knowledge space: entry and exit of US cities from patent classes, Regional Studies. US patent and citation data are used to measure technological relatedness between major patent classes in the United States Patent and Trademark Office (USPTO). The technological relatedness measures, constructed as the probability that a patent in class j will cite a patent in class i, form the links of a knowledge network. Changes in this knowledge network are examined from 1975 to 2005. Evolution of the patent knowledge base within US metropolitan areas is tracked by combining the knowledge network with annual patent data for each city. Entries and exits of cities from patent classes are linked to local and non-local measures of technological relatedness.
Technological Relatedness and Knowledge Space: Entry and Exit of US Cities from Patent Classes
Rigby D. L. Technological relatedness and knowledge space: entry and exit of US cities from patent classes, Regional Studies. US patent and citation data are used to measure technological relatedness between major patent classes in the United States Patent and Trademark Office (USPTO). The technological relatedness measures, constructed as the probability that a patent in class j will cite a patent in class i, form the links of a knowledge network. Changes in this knowledge network are examined from 1975 to 2005. Evolution of the patent knowledge base within US metropolitan areas is tracked by combining the knowledge network with annual patent data for each city. Entries and exits of cities from patent classes are linked to local and non-local measures of technological relatedness.
Technological Relatedness and Knowledge Space: Entry and Exit of US Cities from Patent Classes
Rigby, David L. (author)
Regional Studies ; 49 ; 1922-1937
2015-11-02
16 pages
Article (Journal)
Electronic Resource
English
Knowledge space , Technological relatedness , Patents , Citations , Entry , Exit , 知识空间 , 技术关联性 , 专利 , 引证 , 进入 , 退出 , Espace de connaissances , Relations technologiques , Brevets , Entrée , Sortie , Wissensraum , Technische Verwandtschaft , Patente , Zitate , Zugang , Abgang , Espacio de conocimiento , Relación tecnológica , Patentes , Citas , Entrada , Salida , O18 , O31 , R12
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