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The private values of 'thickets'and 'fences' : towards an updated picture of the use of patents across industries
Reitzig, Markus - In: Economics of innovation and new technology 13 (2004) 5, pp. 457-476
Persistent link: https://www.econbiz.de/10002001531
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Firm formation and regional spillovers : evidence from Germany
Harhoff, Dietmar - In: Economics of innovation and new technology 8 (1999) 1/2, pp. 27-55
Persistent link: https://www.econbiz.de/10001379733
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R&D and productivity in German manufacturing firms
Harhoff, Dietmar - In: Economics of innovation and new technology 6 (1998) 1, pp. 29-49
Persistent link: https://www.econbiz.de/10001244312