Lokshin, Boris; Belderbos, René; Carree, Martin - In: Oxford Bulletin of Economics and Statistics 70 (2008) 3, pp. 399-413
We examine the impact of internal and external R&D on labour productivity in a 6-year panel of Dutch manufacturing firms. We apply a dynamic panel data model that allows for decreasing or increasing returns to scale in internal and external R&D and for economies of scope. We find complementarity...