or output of a knowledge production function. We suggest that the productivity of research in patent production functions … to patentable knowledge, and development happens after the initial research phase that may have led to a patent. Instead … of using data on R&D, we separate the knowledge creating process into 'R' and 'D'. This data stems from R&D surveys of …

or output of a knowledge production function. We suggest that the productivity of research in patent production functions … to patentable knowledge, and development happens after the initial research phase that may have led to a patent. Instead … of using data on R&D, we separate the knowledge creating process into 'R' and 'D'. This data stems from R&D surveys of …

market (innovation). It turns out that spillovers from rivals lead to more imitation, while inputs from customers and … research institutions enhance original innovation. …

Innovation activities in the German enterprise sector showed two opposing trends over the past two decades: While total … innovation expenditures grew substantially, the number of firms conducting innovation activities fell sharply. Innovation … expenditures hence concentrate on fewer firms. In this paper we analyse the evolution of firms' innovation and R&D activities …