First Author:   Jen-Je Su Department of Applied and International Economics, Massey University (New Zealand) j.j.su@massey.ac.nz   Department of Applied and International Economics,, Massey University, Private Bag 11222 Palmerston North, New Zealand   64-6-3505799 extn 2666(Phone) 64-6-3505799 extn 2666(Fax)