Francesco Cesarone Department of Business Studies, Roma Tre University   Via Silvio D'Amico, 77 Roma, Roma 00145 Italy   francesco.cesarone@uniroma3.it   http://host.uniroma3.it/docenti/cesarone/index.htm           JEL Areas: G1 : General Financial Markets: General (includes Measurement and Data) C6 : Mathematical Methods and Programming: General