The Optimal Tariff Structure in Higher Dimensions
将一个大型国家最优贸易政策是进口关税的二维结论推广到高维，在总替代性条件下得到最优关税的弱形式，并给出强形式及最优政策下贸易税收非负的充分条件。
This paper generalizes to higher dimensions the two good result that the optimal trade policy for a large country is an import tariff. A weak form of the optimal tariff, requiring that an import (export) good be most (least) protected holds under gross substitutability. Sufficient conditions are obtained for a strong form of the optimal tariff (which requires that all imports be more protected than any export) and also for the trade tax revenue to be nonnegative in the optimal policy. Copyright 1990 by Economics Department of the University of Pennsylvania and the Osaka University Institute of Social and Economic Research Association.