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本文把环境保护投资从生产函数中的资本变量中分离,以求得环保投资增长对于经济增长的贡献率,并建立了AR(2)模型进行外推预测。结果表明环保投资短期内阻碍经济发展但长期内会推动经济增长,我国已处在由阻碍向推动的过度时期。针对样本容量不足的问题,本文采用样条函数差值的方法加以解决。
In this paper, the environmental protection investment is separated from the capital variables in the production function to find the contribution rate of the growth of environmental investment to economic growth, and the AR (2) model is established to extrapolate it. The results show that investment in environment protection hinders economic development in the short term but will promote economic growth in the long term. Our country is in an excessive period of impeding impetus. Aiming at the problem of insufficient sample size, this paper uses the method of difference of spline function to solve it.