First Author:   Mark J. Holmes University of Waikato holmesmj@waikato.ac.nz   Department of Economics, University of Waikato, Private Bag 3105 Hamilton, 3240, New Zealand   64-7-838-4454(Phone) 64-7-838-4454(Fax) Second Author: Xin Shen University of Waikato xs67@waikato.ac.nz   Department of Economics, University of Waikato, Private Bag 3105 Hamilton, 3240, New Zealand