Measuring patent quality in international comparison - index development and application to China


Boeing, Philipp ; Müller, Elisabeth


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URL: https://ub-madoc.bib.uni-mannheim.de/39661
URN: urn:nbn:de:bsz:180-madoc-396610
Document Type: Working paper
Year of publication: 2015
The title of a journal, publication series: ZEW Discussion Papers
Volume: 15-051
Place of publication: Mannheim
Publication language: English
Institution: Sonstige Einrichtungen > ZEW - Leibniz-Zentrum für Europäische Wirtschaftsforschung
MADOC publication series: Veröffentlichungen des ZEW (Leibniz-Zentrum für Europäische Wirtschaftsforschung) > ZEW Discussion Papers
Subject: 330 Economics
Classification: JEL: O34 , O32,
Keywords (English): Patent quality , PCT system , China
Abstract: We develop an index that compares the quality of Patent Cooperation Treaty (PCT) applications by considering citations generated by International Search Reports (ISRs). In its most restrictive variation, i.e. excluding citations from the home country and self-citations, the ISR index is not biased by selectivity in filing strategies, differences in citations due to varying national examination procedures, or domestic economic policies. Against the background of strong increases in Chinese patenting between 2001 and 2009, we compare the quality of Chinese PCT applications with those from high-income countries. Chinese PCT applications achieve only 34% of the quality level of international PCT applications. In addition, their quality is decreasing over time. We find that the patent quality of firms increases in R&D stocks but decreases with the introduction of PCT subsidies. Our results confirm that China’s expansion of international filings was achieved to the detriment of quality.

Das Dokument wird vom Publikationsserver der Universitätsbibliothek Mannheim bereitgestellt.




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Boeing, Philipp ; Müller, Elisabeth (2015) Measuring patent quality in international comparison - index development and application to China. Open Access ZEW Discussion Papers Mannheim 15-051 [Working paper]
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