Kim Hang Pham Do Massey University   Dept. of Applied and International Economics Massey University Palmerston North, New Zealand   K.H.Phamdo@massey.ac.nz   http://econ.massey.ac.nz/staff/staff_phamdo.htm           JEL Areas: C7 : Game Theory and Bargaining Theory:General Q2 : Renewable Resources and Conservation: General