First Author:   Ross McKitrick University of Guelph rmckitri@uoguelph.ca   Department of Economics, University of Guelph Guelph, N1G 2W1, Canada   (519)824-4120 x2532(Phone) (519)824-4120 x2532(Fax) http://www.uoguelph.ca/~rmckitri/ross.html