Leading on from the measurement of the geographical dimension of knowledge externalities at aggregated spatial levels, the works carried out in the economic geography of innovation have gradually turned towards the analysis of the mechanisms underlying the spatial diffusion of knowledge...

Within the European context, current policies for innovation and competitiveness are often based on the cluster?s principles, as in France for example with the « pôles de compétitivité » policy. Implementing such policies creates new needs for indicators capable to characterize clusters...