Knowledge, Innovation Activities and Industrial Evolution.

We argue that the distinction between tacit and codified knowledge is indeed very important, but it constitutes only a part of the categorization of the dimensions of knowledge relevant for understanding innovative activities and firms' and industrial evolution. In particular, we emphasize the relevance of the notion of competencies and of some further properties of knowledge, like technological regimes (opportunities, accessibility and cumulativeness), domains of knowledge (in terms of technology, demand and applications) and knowledge complementarities (and the related issues of coordination and integration of these complementarities). Copyright 2000 by Oxford University Press.