Agathi Tsoka University of Ioannina, Department of Economics   Department of Economics University of Ioannina Ioannina, 451 10 GREECE   agathatsoka@yahoo.gr             JEL Areas: E2 : Macroeconomics: Consumption, Saving, Production, Employment, and Investment: General (includes Measurement and Data) C2 : Single Equation Models; Single Variables: General