[eng] The development of high tech clusters depends on the spatial proximity of a set of complementary and interdependent competencies, which contribute to entrepreneurship and firms' growth. Relating Granovetter's theory of strong and weak ties to situated learning approaches, this articles...

[eng] This article aims at analysing co-ordi-nation processes taking into account that the cognitive structures of agents are heterogeneous. Then, analysis has to focus on individual and collective learning, on the way knowiedge is created, transferred and organised. On this basis, we show that...