内生经济增长中的政府行为.pdfVIP

摘 要 本文首先讨论了具有外生储蓄率的经济增长模型Solow 模型，并结合动 力系统的知识对模型的稳定性进行了讨论；接着将该模型的储蓄率进行内生化， 引入代表性消费者行为，从而得到 Ramsey 模型；最后介绍了具有稳定增长率的 内生经济增长模型，并着重讨论了带技术进步的内生增长经济模型中政府的行 为和政府的公共支出对技术进步和经济增长率的影响。 巴罗 1990 年在生产函数中引入政府购买行为，假设政府购买具有正的外部 性，得到税收与内生增长率的倒 U 曲线。1987 年罗默提出具有扩大产品种类的 技术进步模型，本文是在罗默模型的基础上，引入政府公共支出，并且假设政 府公共支出分为两部分，一部分对产品的生产具有正的外部性，另一部分对技 术进步具有正的外部性，当经济处于均衡时，政府在这两种公共支出间选择最 佳比例使得经济增长率极大。 关键词：Solow 模型；Ramsey 模型；内生经济增长；技术进步；政府公共支出 Abstract The paper firstly discusses the Solow model which is a economic growth model with exogenous saving rate. And analyzes its stability by using dynamic system. Then typical consumer behavior was brought in the former model , and we get Ramsey model. At last, I introduce the endogenous economic growth model, and discuss government behavior in the economic growth model with technology progress. In 1990, Barro brought government purchase in the product function by the assumption that government purchase has positive externality to the production. And found that the relationship between endogenous growth rate and tax satisfies reverse U-curve. In 1987, Romer introduced technology progress model with the increasement of product category. The paper is based on Romer’s model, and bring the government behavior in the model. I assume that government purchase has two kinds of positive externalities:one for the production of commodity, the other for technology progress. When the economics is on steady state , the government select the best ratio between the two options to maximize the endogenous economic growth rate. Key words: Solow model; Ramsey model; endogeno