The purpose of this paper is to assess the impact of the Tokyo Round of Multilateral Trade Negotiations (MTN) on the major discriminatory trade arrangements. We present results from the import-disaggregated version of the Michigan Computational Model of World Production and Trade which has been used to analyze the production, trade, employment, and price effects of the tariff and some nontariff barrier (NTB) reductions of the Tokyo Round. The model used in this study, while retaining the same degree of country and product detail obtained by Deardorff and Stern (1981, 1983) distinguished bilateral trade flows. Thus the model can be constrained to reflect preferential trading.Research Seminar in International Economics, Department of Economics, University of Michiganhttp://deepblue.lib.umich.edu/bitstream/2027.42/100646/1/ECON121.pd