By Mendonça Helder Ferreira de   Galvão Délio José Cordeiro   Loures Renato Falci Villela   in Journal of Economic Studies

ISSN:0144-3585|39|4|380-397

Emerald Group Publishing Ltd‎(2012)‎

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By de Mendonca Helder Ferreira   Galvao Delio Jose Cordeiro   Loures Renato Falci Villela   in Applied Economics Letters

ISSN:1466-4291|18|5|485-491

Routledge Ltd‎(2011)‎

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