[1] Aarhus Univ, Dept Econ & Business, DK-8210 Aarhus V, Denmark
[2] Heidelberg Univ, Alfred Weber Inst Econ, D-69115 Heidelberg, Germany
[3] Univ Gottingen, D-37073 Gottingen, Germany
[4] Univ Mannheim, Dept Econ, D-68131 Mannheim, Germany
[5] Univ Oradea, Dept Int Relat, Oradea, Romania
[6] Walter Eucken Inst, D-79100 Freiburg, Germany