Technological Relatedness and Knowledge Space: Entry and Exit of US Cities from Patent Classes

被引：220
|
作者：
Rigby, David L. [1 ]
机构：
[1] Univ Calif Los Angeles, Dept Geog, Los Angeles, CA 90095 USA
来源：
REGIONAL STUDIES | 2015年 / 49卷 / 11期
关键词：
Knowledge space; Technological relatedness; Patents; Citations; Entry; Exit; RESEARCH-AND-DEVELOPMENT; INNOVATIVE ACTIVITIES; TACIT KNOWLEDGE; GEOGRAPHY; SPILLOVERS; VARIETY; FIRMS; CITATIONS; EVOLUTION; COHERENCE;
D O I：
10.1080/00343404.2013.854878
中图分类号：
F [经济];
学科分类号：
02 ;
摘要：
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.
引用
收藏
页码：1922 / 1937
页数：16
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