Estimating the Global Economic Effects of GMOs Kym Anderson Centre for International Economic Studies University of Adelaide Chantal Pohl Nielsen Danish Institute of Agricultural and Fisheries Economics and University of Copenhagen Sherman Robinson International Food Policy Research Institute Washington D.C. Karen Thierfelder U.S. Naval Academy Annapolis MD Revision of a paper presented at the IFPRI-sponsored pre-conference workshop of the Australian Agricultural and Resource Economics Society, Adelaide, 22 January 2001. Forthcoming in Agricultural Biotechnology: Markets and Policies in an International Setting, edited by P. Pardey, Washington, D.C.: International Food Policy Research Institute, 2001.