Affiliation: | 1. Department of Management, Accounting and Quantitative Methods, Economics Faculty , Second University of Naples , Capua , CE , 81043 , Italy;2. Department of Analysis of Economic and Social Systems , University of Sannio , Benevento , BN , 81024 , Italy;3. Laboratoire de Physique Industrielle et Traitement de l’Information , EA2415, Faculté de Pharmacie, 34093 , Montpellier Cedex 5 , France |