Economics of Grids, Clouds, Systems, and Services 15th International Conference, GECON 2018, Pisa, Italy, September 18-20, 2018, Proceedings - Coppola, Massimo; Coppola, Massimo; Carlini, Emanuele; Carlini, Emanuele; D'Agostino, Daniele; D'Agostino, Daniele; Altmann, Jörn; Altmann, Jörn; Bañares, José Ángel; Bañares, José Ángel (Springer International Publishing : Imprint: Springer, 2019)