全球智库信息集成服务系统(G2TT): Lens or Prism? Patent Citations as a Measure of Knowledge Flows from Public Research

G2TT

来源类型	Working Paper
规范类型	报告
DOI	10.3386/w18292
来源ID	Working Paper 18292
	Lens or Prism? Patent Citations as a Measure of Knowledge Flows from Public Research
	Michael Roach; Wesley M. Cohen
发表日期	2012-08-17
出版年	2012
语种	英语
摘要	This paper assesses the validity and accuracy of firms' backward patent citations as a measure of knowledge flows from public research by employing a newly constructed dataset that matches patents to survey data at the level of the R&D lab. Using survey-based measures of the dimensions of knowledge flows, we identify sources of systematic measurement error associated with backward citations to both patent and nonpatent references. We find that patent citations reflect the codified knowledge flows from public research, but they appear to miss knowledge flows that are more private and contract-based in nature, as well as those used in firm basic research. We also find that firms' patenting and citing strategies affect patent citations, making citations less indicative of knowledge flows. In addition, an illustrative analysis examining the magnitude and direction of measurement error bias suggests that measuring knowledge flows with patent citations can lead to substantial underestimation of the effect of public research on firms' innovative performance. Throughout our analyses we find that nonpatent references (e.g., journals, conferences, etc.), not the more commonly used patent references, are a better measure of knowledge originating from public research.
主题	Econometrics ; Estimation Methods ; Development and Growth ; Innovation and R& ; D ; Growth and Productivity
URL	https://www.nber.org/papers/w18292
来源智库	National Bureau of Economic Research (United States)
引用统计
资源类型	智库出版物
条目标识符	http://119.78.100.153/handle/2XGU8XDN/575967
推荐引用方式 GB/T 7714	Michael Roach,Wesley M. Cohen. Lens or Prism? Patent Citations as a Measure of Knowledge Flows from Public Research. 2012.

条目包含的文件
文件名称/大小	资源类型	版本类型	开放类型	使用许可
w18292.pdf（899KB）	智库出版物		限制开放	CC BY-NC-SA	浏览