共 12 条
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R&D boundaries of the firm: An estimation of the double-hurdle model on commissioned R&D, joint R&D, and licensing in Japan[J] . Kenta Nakamura,Hiroyuki Odagiri.Economics of Innovation and New Technology . 2005 (7)
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Internal and External R&D: A Sample Selection Approach*[J] . Claudio A.Piga,MarcoVivarelli.Oxford Bulletin of Economics and Statistics . 2004 (4)
[9]
Internal Versus External R&D: A Study of R&D Choice with Sample Selection[J] . James H. Love,Stephen Roper.International Journal of the Economics of Business . 2002 (2)
[10]
Absorptive Capacity: A Review, Reconceptualization, and Extension[J] . Shaker A. Zahra,Gerard George.The Academy of Management Review . 2002 (2)