Although the phase of euphoria seems to be over, policymakers and regional agencies have maintained their interest in cluster policy. Modern cluster theory provides reasons for positive external effects that may accrue from interaction in a group of proximate enterprises operating in common and...

We propose a random network model incorporating heterogeneity of agents and a continuous notion of homophily. Unlike the vast majority of the corresponding economic literature, we capture homophily in terms of similarity rather than equality of agents. We show that if links between similar...

Purpose: Little research focuses on the conditions under which companies open up to co-develop knowledge with external actors. Spatial proximity has been proved insufficient to generate successful open innovation processes: socio-economic proximity also seems required. This paper aims at better...