Czarnitzki, Dirk (contributor); Kraft, Kornelius (contributor) - 2008
Many studies investigate the relationship between R&D expenditures as an input and patents as an intermediate product … has been underestimated in the literature, as scholars typically use information about R&D, i.e. the sum of research … of using data on R&D, we separate the knowledge creating process into 'R' and 'D'. This data stems from R&D surveys of …