绿色增长视角下环境规制强度对导向性技术创新的影响研究

针对环境规制的实施是如何影响导向性技术创新选择以实现绿色增长这一问题,构建了以社会福利最大化的绿色增长目标为目标函数、以保证均衡增长率的持续增长和环境质量的持续改善为约束条件的非线性最优控制模型.利用最优控制理论和极大值原理,分别得到了棕色技术创新投资收益率、绿色技术创新投资收益率和资本分配的定量表达式.模型的数值仿真结果表明:尽管棕色资本在资本积累中的生产弹性上存在优越性,但绿色资本才是维持全社会经济增长的重要支撑;环境规制的实施能够促进资本分配转向绿色技术创新领域,且强度越大越有助于绿色资本利用,而进一步的绿色技术创新对绿色增长目标实现具有更有效的推动作用.

Study on the influence of environmental regulation intensity on the directed technological change under the perspective of green growth

A nonlinear optimal control model has been constructed to address the question of how environmental regulations contribute to green growth by affecting choices of leading technology innovation. The model consists with an objective function of green growth achievement as well as constrains of growth at an equilibrium growth rate and continuous improvement of environmental quality. Drawing on the theory of optimal control and the principle of maximal value, the quantity expressions of brown technology innovation investment returns, green technology innovation investment returns, and capital allocation have been constructed. The results of the numerical simulation reveal that:although the brown capital achieves high productive elasticity, green capital is the critical support of economic growth; implementation of environmental regulations will direct investment to the green technological innovation arena, and the more intense of the regulations, the more green investment will be utilized; further green-tech innovation will facilitate more achievements of green growth.