³A comprehensive definition of an effective cluster is: “A geographical and tangible concentration of advanced economic, technological and social activities – both private and public – in a given region, that is driven by synergy coming from network of actors committed (social capital) and usually supported by public policy in order to enhance the cluster performance (in particular, competitiveness, innovation, shared values and trust) – of both the actors individually and the region as a whole – on the basis of a smart (innovative and sustainable) use of territorial capital in the area concerned" (www.effectiveclusters.eu).