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视排放强度为政府据减排目标而设定的一个外生的标准,并将自然资源耗用和治污投入同时纳入到内生人力资本的模型框架,然后利用最优控制理论考察了长期经济增长的内在机制。模型结果显示,在排放强度下降速度满足一定的临界条件下,可持续的最优经济增长以及环境质量改善是能够实现的;在平衡增长路径上,排放强度下降率的提升将导致稳态增长率增加,并相应要求加强人力资本的积累;同时,自然资源的耗用速度必须低于人力资本的增长速度;另外,人力资本生产率、跨期替代弹性以及时间贴现率等也影响着长期经济增长。
The emission intensity is regarded as an exogenous standard set by the government according to emission reduction targets. At the same time, natural resource consumption and pollution control inputs are integrated into the model framework of endogenous human capital, and then the optimal control theory is used to examine the long-term economy The inherent mechanism of growth. The results of the model show that sustainable optimal economic growth and environmental quality improvement can be achieved under the condition that the rate of decline of emission intensity meets a certain critical condition. On the path of balanced growth, the increase of the emission intensity decrease rate will lead to steady-state growth rate In the meantime, the rate of natural resource consumption must be lower than the growth rate of human capital. In addition, human capital productivity, intertemporal substitution elasticity and time discount rate also affect the long-term economic growth.