Dolfsma, W.A.; Leydesdorff, L.; Panne, G. van der - Erasmus Research Institute of Management (ERIM), ERIM … - 2004
), and firm sizes in terms of number of employees (proxy of organization). The knowledge base is mapped at three levels …: national (NUTS-1), provincial (NUTS-2), and regional (NUTS-3). The levels can be cross-tabled with the knowledge …-intensive sectors and services. The results suggest that medium-tech sectors contribute to the knowledge base of an economy more than …