Dynamic Analysis of Policy Effects in Monopolistically Competitive Economies

1.不完全市场动态经济的不确定性和复杂行为：为了弄清动态垄断竞争经济中的政策效应，我首先试图研究不完全市场经济的动态行为。在文章#2和#4（见参考文献）中，我导出了在有或没有社会报酬递增的两部门内生增长模型中均衡不确定性成立的条件。这些论文证明了，在两部门模型中，社会增长的存在并不是保持不确定性的必要条件。在第三篇文章中，我探讨了增长模型中均衡不确定性的一些经济含义。2.不完全竞争动态经济中的最优政策。在上述研究结果的基础上，我考察了不同的政策效应，并分析了不同的政策效应对经济增长的影响。最后，我还讨论了不完全竞争动态经济中的最优政策。最后，我还讨论了不完全竞争动态经济中的最优政策效应。最后，我还讨论了不完全竞争动态经济中的最优政策效应。最后，我还讨论了不完全竞争动态经济中的最优政策效应。最后，我还讨论了不完全竞争动态经济中的最优政策效应。 ...更多信息 不完全竞争的动态经济体。第1篇文章研究了具有研发投资的内生增长经济中的最佳专利政策。我（与合著者，二神浩一和大草勇）证明，存在一个有限的，福利最大化的专利长度，无限的专利保护可能是有害的社会福利的观点。在文章#6，我研究了收益递增下的动态最优税收.本研究的主要结果表明，资本所得税在稳态下应该是负的。然而，这一结论也被证明是敏感的政策规则（即开环与反馈）所采用的财政当局。最后，文章#5研究了在重叠世代的经济中的货币供应政策的增长和福利效应。我（和合著者柴田）分析了在替代政策规则下帕拉托改善货币政策的存在。本文还论证了在政府预算约束下内生决定货币增长的均衡可能存在不确定性。少

The results obtained in this research project may be summarized as follows :1.Indeterminacy and complex behavior of the dynamic economies with imperfect markets :In order to clarify the policy effects in dynamic, monopolistically competitive economies, I have first tried to investigate the dynamic behavior of economies with imperfect markets. In Articles #2 and #4 (see REFERENCES), I derive the conditions under which indeterminacy of equilibrium holds in two sector models of endogenous growth with or without social increasing returns. These papers demonstrate that the presence of social increasing, which has been considered a necessary condition for generating indeterminacy, may not be required to hold indeterminacy in two-sector models.In Article #3, I explored some economic implications of indeterminacy of equilibrium in growth models.2.Optimal policies in dynamic economies with imperfect competition.Based on research results mentioned above, I have inspected various policy effects i … More n dynamic economies with imperfect competition. Article #1 investigated the optimal patent policy in an endogenously growing economy with R&D investment. I (with co-authors, Koichi Futagami and Ysushi Ohkusa) demonstrated that there exists a finite, welfare maximizing patent length so that unlimited patent protection may be harmful from the social welfare viewpoint. In Article #6, I studied the dynamic optimal taxation under increasing returns. The main results of this study show that capital income taxation should be negative in the steady state. However, it is also shown that this conclusion is sensitive to the policy rule (i.e. open-loop vs. feedback) adopted by the fiscal authority.Finally, Article #5 studies growth and welfare effects of money supply policy in an overlapping generation's economy. I (and co-author, Akihisa Shibata) analyzed the presence of Parato improving monetary policy under alternative policy rules. This paper also demonstrated that indeterminacy of equilibria might exist if money growth is endogenously determined according to the government budget constraint. Less