[1] IIT Kharagpur, Dept Comp Sci & Engn, Kharagpur 721302, India
[2] Univ Reading, Henley Business Sch, Reading RG9 3AU, England
[3] Univ Torino, Dept Management, I-10134 Turin, Italy
[4] Ural Fed Univ, Grad Sch Econ & Management, Lab Int & Reg Econ, Ekaterinburg, Russia