三种类型的内生增长模型

Three Types of Endogenous Growth Models

以索洛模型为代表的新古典增长理论预言长期的经济增长由外生的技术进步所支持 ,模型中有三个关键的经济变量是外生的 :储蓄率、技术进步率和人口增长率。由罗默发端的新增长理论强调用模型内部的因素来解释长期的经济增长。新增长理论可以认为是对索洛模型的扩展和内生化 ,主要涉及三种类型 :非递减报酬、内生技术进步以及内生的人口增长和劳动供给。

As the representative of the neoclassical growth theories, Solow model predicts that economic growth in the long run is supported by exogenous technological progress. In this model there are three crucial economic variables, namely, the rate of saving, the rate of technological progress and the rate of population growth. The new growth theory initiated by Romer, on the other hand, emphasizes interpreting long term economic growth through internal variables. The author holds that this new growth theory could be considered an extension of Solows model, and identifies three major types growth models in the light of this theory: the non decreasing returns of accumulative factors, the endogenous technological progress, and the endogenous population growth/labor supply.