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dc.contributor.authorThorwarth, Susanneen_US
dc.contributor.authorKraft, Korneliusen_US
dc.contributor.authorCzarnitzki, Dirken_US
dc.coverage.temporal1993-2003en_US
dc.date.accessioned2009-02-16T15:09:31Z-
dc.date.available2009-02-16T15:09:31Z-
dc.date.issued2008en_US
dc.identifier.urihttp://hdl.handle.net/10419/24742-
dc.description.abstractMany studies investigate the relationship between R&D expenditures as an input and patents as an intermediate product or output of a knowledge production function. We suggest that the productivity of research in patent production functions has been underestimated in the literature, as scholars typically use information about R&D, i.e. the sum of research expenditure and development expenditure, due to data availability. However, in most industries only (applied) research will lead to patentable knowledge, and development happens after the initial research phase that may have led to a patent. Instead of using data on R&D, we separate the knowledge creating process into 'R' and 'D'. This data stems from R&D surveys of Belgian firms. It turns out that only the 'R' part of R&D expenditure has a significant effect on patents and that development expenditure are insignificant. Thus previous literature relying on R&D expenditure suffers from a measurement error, such that the coefficient of R&D is biased towards zero, as R&D includes a large fraction of irrelevant expenditure, i.e. development expenditure, with respect to patenting.en_US
dc.language.isoengen_US
dc.publisherZentrum für Europäische Wirtschaftsforschung (ZEW) Mannheim-
dc.relation.ispartofseriesZEW Discussion Papers 08-046en_US
dc.subject.jelO31en_US
dc.subject.jelO32en_US
dc.subject.ddc330en_US
dc.subject.keywordPatentsen_US
dc.subject.keywordResearchen_US
dc.subject.keywordDevelopmenten_US
dc.subject.keywordKnowledge Production Functionen_US
dc.subject.stwPatenten_US
dc.subject.stwForschungskostenen_US
dc.subject.stwIndustrielle Forschungen_US
dc.subject.stwProduktivitäten_US
dc.subject.stwMessungen_US
dc.subject.stwInnovationen_US
dc.subject.stwWissenen_US
dc.subject.stwProduktionsfunktionen_US
dc.subject.stwBelgienen_US
dc.titleThe Knowledge Production of 'R' and 'D'en_US
dc.typeWorking Paperen_US
dc.identifier.ppn57186029Xen_US
dc.rightshttp://www.econstor.eu/dspace/Nutzungsbedingungen-
dc.identifier.repecRePEc:zbw:zewdip:7356-
Appears in Collections:ZEW Discussion Papers
Publikationen von Forscherinnen und Forschern des ZEW

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