1. Department of Economics and Statistics Università degli Studi di Salerno Via Ponte Don Melillo Fisciano (SA) 84084 Italy
2. Business Research Unit (BRU‐IUL) Instituto Universitário de Lisboa (ISCTE‐IUL) Av.a das Forças Armadas Lisboa 1649‐026 Portugal
3. Centro di Economia del Lavoro e di Politica Economica Università degli Studi di Salerno Fisciano Italy
4. Institute of Statistics and Mathematical Methods in Economics TU Wien Wiedner Hauptstr. 8‐10 Wien 1040 Austria
5. International Monetary Fund 700 19th St NW Washington 20431 DC USA
6. Center for Economic Studies and Ifo Institute Poschingerstr. 5 Munich 81679 Germany