[1] European Univ Inst, Florence, Italy
[2] CEPR, Florence, Italy
[3] Vrije Univ Amsterdam, Amsterdam, Netherlands
[4] CEPR, Amsterdam, Netherlands
[5] European Univ Inst, Robert Schuman Ctr Adv Studies, Via Giovanni Boccaccio 121, I-50133 Florence, Italy
[6] Tinbergen Inst, Boelelaan 1105, NL-1081 HV Amsterdam, Netherlands
[7] CESifo, Boelelaan 1105, NL-1081 HV Amsterdam, Netherlands
[8] Vrije Univ Amsterdam, Boelelaan 1105, NL-1081 HV Amsterdam, Netherlands