Dynamic Studies of Trade Policy: Comparative Studies of Tariff/Quota Free Trade

本研究的贡献包括两部分。第一部分是在参考文献#1、#2中列出的文章和编辑卷的一章中。本书的主要内容由艾伦·伍德兰编辑，埃德加·埃尔加出版社2002年出版。论文1给出了正文结果的数学证明。论文第二部分阐述了全文的贡献，同时提出了待讨论的问题。研究的第二部分是建立内生贸易政策模型，其分析采用多阶段博弈模型进行，以免出现时间不一致性。该模型不是一个简单的贸易政策模型，而是结合了政治经济学的特征。所选择的贸易政策是保护主义党与自由主义党政治竞争的结果。将理论结果应用于战后日本政治的贸易政策，以检验其稳健性。最后一年，比主要研究人员更多的研究人员有机会在各个大学参加研讨会和国际会议。以下是我们贡献的两部分的简短摘要。我们扩展了现有的战略贸易政策模型，以纳入增加规模回报，即降低平均生产成本。两国之间进行不完全替代贸易和古诺竞争。在一定条件下，补贴提高了世界福利。这并不一定意味着自由贸易是不可取的。贡献是对现有分析模型的概括。第二个主题是长期贸易政策的动态政治模型。将内生贸易政策模型与政治经济模型相结合。传统新古典主义分析缺少的一个特征是文化方面。我们认为政治文化和商业文化是经济的重要决定因素。扩展了多阶段博弈，并将理论结果应用于战后日本政治的风格化事实中进行检验。我们发现该模型与它非常吻合。少

The contributions resulted from this research consist of two parts. The first part is in those articles listed in reference #1, #2 and a chapter of the edited volume. The main text is in the book which is edited by Alan Woodland and published from Edgar Elgar 2002. The paper #1 gives the mathematical proofs of the results in the main text. And the paper #2 states the contribution of the main text, and at the same time develops the issues to be discussed.The second part of the research is to develop a model of endogenous trade policy and its analysis is carefully developed by using a multi stage game model so as not to have time inconsistency. The model is not a simple trade policy model, but it combines with political economy characteristics. The chosen trade policy is the outcome of the political competition between protectionist party and liberal party. The theoretical results are applied to the post War Japanese politics in terms of trade policy to test robustness of it.The final ye … More ar of the study than main researcher had chances to have seminars at various universities and an international conference. The short abstracts of the two parts of our contributions are following.1. We extend the existing strategic trade policy model to incorporating increasing returned to scale, i.e. decreasing average production cost. The two countries engage in imperfect substitutes trades with each other, and in Cournot competition. Under some condition subsidy improves world welfare. This does not necessary to means that free trade is less desirable. The contribution is a generalization of the existing analytical model.A dynamic political model of trade policy in the long term is developed as the second topic. An endogenous trade policy model is combined with a political economy model. One feature which is missing in traditional neoclassical analysis is cultural aspect. We consider political culture and commercial culture as important determinants of economy. Multi stage game is expanded, and the theoretical results are tested by applying to the stylized facts of post War Japanese politics. We find that the model well fits to it. Less