← Search Research Policy 2009 A real options perspective on R&D portfolio diversification Sjoerd van Bekkum; Enrico Pennings; Han Smit Tinbergen Institute open access DOI10.1016/j.respol.2009.03.009 Sources semanticscholar openalex Cite APA 7 MLA 9 Chicago (author–date) Harvard Elsevier Harvard (JFE, JBF…) The Accounting Review Academy of Management American Marketing Association INFORMS (Management Science) Copy citation Copied ✓