Laboratory of Quantitative Analysis of Agribusiness Organization, Division of Industrial Organization of Agribusiness, Department of Agricultural and Resource Economics, Graduate School of Bioresource and Bioenvironmental Sciences, Kyushu University
Shono and Kawaguchi (1999a) present spatial equilibrium model of perfectly competitive international trade under real tariff quota system with specific duties and ad valorem duties. But ratiff system of pork in Japan is differentiate tariff system, and so their model can not deal with import of pork in Japan. In this paper, we generalize their model to take differentiate tariff system into consideration. Generalization for the differentiate tariff system is made theoretically for perfectly competitive case. Implications of this paper and problems to be solved in the future are summarized of this paper.