Summary
         
         
            Objectives: This paper assumes that in addressing major challenges related to telemedicine as
            networks enabling huge improvements of heath services we need to move beyond complexity
            and rather focus on the very nature of such networks.
         
         
            Methods: The results of this paper are based on an interpretive analysis of three case studies
            involving telemedicine, i.e. broadband networks in minimal invasive surgery, EDI infrastructures
            and telemedicine in ambulances.
         
         
            Results and Conclusion: The well-known concept of “critical mass” focuses on the number of users as a significant
            factor of network growth. We argue however, that we should not only consider the size
            of the network, but also the heterogeneity of its elements. In order to discuss heterogeneity
            along several dimensions, we find Granovetter’s and Schelling’s models of diversity
            in individual preferences helpful. In addition to the heterogeneity of the individual
            users, we discuss heterogeneity related to use areas and situation, to technologies,
            etc. The interdependencies and possible conflicts between these dimensions are discussed,
            and we suggest “bootstrapping” as a concept to guide the navigation/exploitation in/of
            these dimensions.
         
         Keywords
Network growth - critical mass - bootstrapping - telemedicine