Nishimura, Junichi; Okada, Yosuke - In: Research Policy 43 (2014) 7, pp. 1250-1263
We examine how R&D portfolios of drug pipelines affect pharmaceutical licensing, controlling firm size, diversity, and competition. The data collected comprises 434 license-ins and 329 license-outs closed by 54 Japanese pharmaceutical companies between 1997 and 2007. We pay special attention to...