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First Author:
 
José Pedro Pontes
Technical University of Lisbon and UECE
ppontes@iseg.utl.pt
 
Instituto Superior de Economia e Gestao, Rua Miguel Lupi,20
Lisboa, 1249-078 Lisboa, Portugal
 
351 21 3925916(Phone)
351 21 3925916(Fax)
http://www.iseg.utl.pt