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Are product- and process-innovations independent of each other?
Kraft, Kornelius - In: Applied economics 22 (1990) 8, pp. 1029-1038
Persistent link: https://www.econbiz.de/10001092552
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On the profitability of innovative assets
Czarnitzki, Dirk; Kraft, Kornelius - In: Applied economics 42 (2010) 13/15, pp. 1941-1953
Persistent link: https://www.econbiz.de/10008737879