Busetta Giovanni University of Messina, Sicily, Italy   Dipartimento "Vilfredo Pareto" Via T. Cannizzaro 278 Messina, Sicily 98122 Italy   gbusetta@unime.it             JEL Areas: E2 : Macroeconomics: Consumption, Saving, Production, Employment, and Investment: General (includes Measurement and Data) J2 : Demand and Suppply of Labor: General