The paper investigates the effects of agglomeration and specialization of technological activities on regional productivity growth, applying the notion of pecuniary knowledge externalities. The latter are indirect interdependencies between firms mediated by the price system. Pecuniary knowledge...

Technological change is far from neutral. The empirical analysis of the rate and direction of technological change in a significant sample of 10 OECD countries in the years 1971-2001 confirms the strong bias of new technologies. The introduction of new and biased technologies affects the actual...

This paper articulates the hypothesis that there is an optimal size of knowledge pools. Too little a density of innovation activities reduces the accessibility of external knowledge. Too large a density enhances congestion and reduces appropriability. Firms can benefit from actual increasing...