Impact of carbon emission trading on quantity increase and quality improvement of urban green technology innovation
[Objective]Green technology innovation is a key force to achieve a win-win situation between environmental protection and economic development.This study aimed to explore the impact of carbon emission trading on the quantity increase and quality improvement of urban green technology innovation,in order to provide a theoretical support and countermeasures for the further establishment and improvement of urban green technology innovation system.[Methods]By examining the green patent data of 291 prefecture-level cities in China from 2005 to 2019,the spatial and temporal pattern of change of urban green technology innovation in China was analyzed,and the impact of carbon emission trading on urban green technology innovation was further explored using the difference-in-differences model.[Results](1)From 2005 to 2019,in terms of temporal change,the scale of green technology innovation in Chinese prefecture-level cities continued to increase,and the proportion of green technology innovation in the total innovation showed a M-shaped pattern of fluctuation;In terms of spatial patterns,Chinese green technology innovation showed an agglomeration trend of high in southeast and low in northwest.(2)Carbon emission trading promoted the improvement of urban green technology innovation,and compared with the improvement of innovation quality,carbon emission trading had a more significant effect on the increase of innovation quantity;(3)From the perspective of temporal heterogeneity,the impact of carbon emission trading on urban green technology innovation showed a time lag,and the longer the policy was implemented,the greater the impact;(4)From the perspective of spatial heterogeneity,the effects of pilot policies in different regions were also different,with the strongest effects in North China,South China,and Southwest China;The effect was not significant in East and Central China.[Conclusion]Carbon emission trading can further have a positive impact on green technology innovation in Chinese cities on the basis of significantly promoting carbon emission reduction.Therefore,efficient implementation and improvement of environmental regulation policies and regulations,emphasis on strengthening environmental governance,and promotion of green technology innovation and economic transformation are effective ways to achieve green and sustainable development.
万方数据
维普
