This paper presents a method by which patent statistics can be used to study the organisation of competencies within firm. We argue that knowledge is heterogeneous because it refers to scientific disciplines and technologies. One must therefore account for how technologies relate to one another...

[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...