First Author:   Matthias Busse Hamburg Institute of International Economics busse@hwwa.de   Neuer Jungfernstieg 21 Hamburg, 20354, Germany   +49-4042834-435(Phone) +49-4042834-435(Fax) Second Author: José Luis Groizard Universitat de les Illes Balears joseluis.groizard@uib.es   Department of Applied Economics, Ctra. de Valldemossa Km. 7.5 Palma de Mallorca, 07122, Spain