This paper provides evidence on the mechanisms influencing the patent output of a sample of biotechnology firms from the input of indirect knowledge acquired from capital expenditures and direct knowledge from in-house R&D. Statistical models of counts are used to analyse the relationship...

Several surveys on intra-industry dynamics have recently reached the conclusion from a large body of evidence that Gibrat's Law does not hold, i.e., the main finding is that firm growth decreases with firm size. However, almost all of these studies have been based on manufacturing. In this paper...