Getting into Networks and Clusters : Evidence from the Mid-Pyrenean GNSS Collaboration Network

This paper contributes to the empirical identification of clusters based on network analysis. We start with the detection of a composite knowledge process rather than a territorial one stricto sensu. Networks and clusters correspond to the complex aggregation process of bi or n-lateral relations in which agents can play heterogeneous structural roles. Their empirical reconstitution requires thus to gather located relational data, whereas their structural properties analysis requires to compute a set of indexes developed in the field of the social network analysis. Our theoretical considerations are tested in the technological field of GNSS (Global Satellite Navigation Systems). We propose a sample of knowledge relations based on collaborative Ramp;D projects and discuss how this sample is shaped and why we can assume its representativeness. Descriptive statistics and structural properties show the influence or the centrality of certain agents in the aggregate structure, and permit to discuss the complementarities between their heterogeneous knowledge profiles