Piga, Claudio A. and Vivarelli, Marco (2004) Internal and external R&D: a sample selection approach. Oxford Bulletin of Economics and Statistics, Vol. 66 (4), p. 457-482. eISSN 1468-0084. Article.
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This study underlines that the decision to enter into an external R&D relationship is related to an antecedent decision to carry out R&D. This calls for an empirical approach that permits the joint analysis of the determinants of the two decisions, correcting for sample selectivity. Based on a sample of Italian manufacturing firms, the results confirm the need to adopt this approach. Another contribution made by this study is the managerial implications that can be derived from its empirical model, which provide a better understanding of the factors associated with a firm's decision to engage in R&D both independently and with external partners.
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