“…The remaining papers (i.e. nineteen) can be grouped into four clusters labeled as follows: business models for smart cities (Abbate et al, 2018;Brock et al, 2018;Schiavone et al, 2018;Van den Buuse and Kolk, 2018); applications to tackle specific smart cities challenges (Amer et al, 2018;Grimaldi et al, 2018;Hopkins and McKay, 2018;Lex et al, 2018;Moustaka et al, 2018;Tanguy and Kumar, 2018); actions and roles of stakeholders of the smart cities triple/quadruple helix (Ardito et al, 2018;Corsini et al, 2018;Dupont et al, 2018;Engelbert et al, 2018;Lindkvist et al, 2018;Van der Graaf and Ballon, 2018); policies for smart cities (Caragliu and Del Bo, 2018;Contreras and Platania, 2018;Hamidi et al, 2018). Concerning the first cluster -business models for smart cities - Abbate et al (2018) explore the activities and strategic goals of twentyone small and medium enterprises (SMEs) operating in eight different European countries that took part to FrontierCities, one of the nine FIWARE (Future Internet-ware) Accelerators focused on smart cities.…”