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The knowledge production of "R and "D"
Czarnitzki, Dirk; Kraft, Kornelius; Thorwarth, Susanne - In: Economics letters 105 (2009) 1, pp. 141-143
Persistent link: https://www.econbiz.de/10003899412
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Innovation indicators and corporate credit ratings : evidence from German firms
Czarnitzki, Dirk; Kraft, Kornelius - In: Economics letters 82 (2004) 3, pp. 377-384
Persistent link: https://www.econbiz.de/10001938468