[1] Fernuniv, Fac Business Adm & Econ, Chair Macroecon, Univ Str 11, D-58097 Hagen, Germany
[2] Kiel Inst World Econ, Hindenburgufer 66, D-24105 Kiel, Germany
[3] Tech Univ Bergakad Freiberg, Fac Econ & Business, Chair Econ, Particular Monetary Macroecon, Schlosspl 1, D-09599 Freiberg, Germany