Selection bias in innovation studies : a simple test


de Rassenfosse, Gaétan ; Wastyn, Annelies


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URL: https://ub-madoc.bib.uni-mannheim.de/31389
URN: urn:nbn:de:bsz:180-madoc-313895
Document Type: Working paper
Year of publication: 2012
The title of a journal, publication series: ZEW Discussion Papers
Volume: 12-012
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: 300 Social sciences, sociology, anthropology
Classification: JEL: O31 , C18 , C52 , C81 ,
Subject headings (SWD): Belgien , Patent , Statistisches Auswahlverfahren , Bias , Innovation , Produktionsfunktion , Schätzung
Keywords (English): innovation production function , patent , R&D , selection bias
Abstract: The study of the innovative output of firms often relies on a count of patents filed at one single office of reference such as the European Patent Office (EPO). Yet, not all firms file their patents at the EPO, raising the specter of a selection bias. Using a novel dataset of the whole population of patents by Belgian firms, we show that the single-office count results in a selection bias that affects econometric estimates of innovation production functions. We propose a methodology to evaluate whether estimates that rely on the single-office count are affected by a selection bias.

Das Dokument wird vom Publikationsserver der Universitätsbibliothek Mannheim bereitgestellt.




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de Rassenfosse, Gaétan ; Wastyn, Annelies (2012) Selection bias in innovation studies : a simple test. Open Access ZEW Discussion Papers Mannheim 12-012 [Working paper]
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