The extent of beta- and sigma-convergence of average labor productivity across manufacturing industries in 18 OECD-countries over the period 1972-1992 show large inter-industry differences. One reason for these differences is knowledge and capital barriers preventing catch-up to occur. We find...

We examine the impact of internal and external R&D on labor productivity in a 6-year panel of 304 innovating firms. We apply a dynamic linear panel data model that allows for decreasing returns to scale in internal and external R&D with a non-linear approximation of changes in the knowledge...