Development of Spatial Equilibrium Model of International Trade under Actual Tariff Systems and Its Application to the International Market Analysis of Agricultural Products

在完全竞争和寡头垄断的国际贸易中，我们将出口配额和最低出口价格引入现有的“关税配额制下从价计征关税下的国际贸易空间均衡模型”(简称SEMIT TQS SAVD)，并得到了该模型实例问题的均衡解(参考文献[1])。针对WTO农业谈判中的一个热点问题，我们将出口补贴引入到SEM IT TQs SAVD中，并将其应用于完全竞争国际贸易情况下的国际乳制品市场分析([3]、[10])。研究了近年来空间均衡模型的发展方向([4])，明确了在空间均衡模型中引入风险和更实用的营销路径的重要性。然后研究了关税配额制下从量从价税([5])下盈利性贸易商的国际贸易空间均衡模型，得到了该模型的例子问题的均衡解。我们聚焦于日墨FTA农业谈判中的一个焦点，在完全竞争的国际贸易情况下，理论上将差别关税引入SEMIT TQS SAVD([6])，然后得到该模型([7])的例子问题的均衡解([7])，并用该模型([9])研究日本猪肉进口市场。在寡头垄断的国际贸易情形下，我们将差别关税引入到SEMIT TQS SAVD模型中，并得到了该模型的实例问题的均衡解([8])。

We introduce export quota and minimum export prices to the existing "Spatial Equilibrium Model of International Trade under Tariff Quota System with Specific and Ad Valorem Duties" (abbreviated as SEM IT TQS SAVD) in the case of perfectly competitive and oligopolistic international trade, and get equilibrium solutions of example problems of this model (Reference [1]). We prove the existence of a solution to Linear Complementarity Problem in SEM IT TQS SAVD we developed and study on its algorithm ([2]).Focussing our attention on a point at issue in WTO agricultural negotiation, we introduce export subsidies to SEM IT TQS SAVD and apply it to analysis of international dairy products market in the case of perfectly competitive international trade ([3],[10]).I study on the direction of development of spatial equilibrium model in recent years ([4]), and make clear the importance of introducing risk and more practical marketing route to spatial equilibrium model. Then I study on spatial equilibrium model of International Trade by Profit-Making Traders under tariff quota system with specific and Ad Valorem duties ([5]), and get equilibrium solutions, of example problems of this model.Focussing our attention on a point at issue in FTA agricultural negotiation between Japan and Mexico, we theoretically introduce differential tariff to SEM IT TQS SAVD in the case of perfectly competitive international trade ([6]), then get equilibrium solutions of example problems of this model ([7]), and also we study Japanese pork import market with this model ([9]). We introduce differential tariff to SEM IT TQS SAVD in the case of oligopolistic international trade, and get equilibrium solutions of example problems of this model ([8]).References [1]-[8] and [10] are included in this REPORT.