First Author:   Constantin Chilarescu Department of Economics, West University of Timisoara cchilarescu@rectorat.uvt.ro   B-dul Parvan No 4 Timisoara, 300223, Romania   +40256592270(Phone) +40256592270(Fax) Second Author: Nicolas Vaneecloo Department of Economics, University of Lille 1 nicolas.vaneecloo@univ-lille1.fr   Cite Scientifique Villeneuve d’Ascq, 59655, France