publication . Article . Other literature type . 2006

Patent Citations as a Measure of Knowledge Flows: The Influence of Examiner Citations

Juan Alcácer; Michelle Gittelman;
Open Access
  • Published: 01 Nov 2006 Journal: Review of Economics and Statistics, volume 88, pages 774-779 (issn: 0034-6535, eissn: 1530-9142, Copyright policy)
  • Publisher: MIT Press - Journals
Analysis of patent citations is a core methodology in the study of knowledge diffusion. However, citations made by patent examiners have not been separately reported, adding unknown noise to the data. We leverage a recent change in the reporting of patent data showing citations added by examiners. The magnitude is high: two-thirds of citations on the average patent are inserted by examiners. Furthermore, 40% of all patents have all citations added by examiners. We analyze the distribution of examiner and inventor citations with respect to self-citation, distance, technology overlap, and vintage. Results indicate that inferences about inventor knowledge using poo...
free text keywords: Economics and Econometrics, Social Sciences (miscellaneous)
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