高铁开通对城市绿色创新"量质齐升"影响研究OA

The influence of high-speed railway on urban green technology innovation represents a pivotal area of study within the broader research on the impact of high-speed railway on regional innovation.To investigate the effect of high-speed railway on the"dual enhancement of quantity and quality"in urban green technology inno-vation,a multi-period Difference-in-Differences(DID)model was established.This model utilises panel data from 41 cities within the Yangtze River Delta urban agglomeration spanning the years 2004 to 2019 to explore how the high-speed railway opening influences urban green technology innovation.The findings reveal that the introduction of high-speed railway significantly promotes the"dual enhancement of quantity and quality"in green technology innovation across the Yangtze River Delta cities.Mechanism analysis further indicates that high-speed railway impacts urban green technology innovation by bolstering economic agglomeration and ven-ture capital investment.Additionally,the effects of high-speed railway opening exhibit heterogeneity in terms of city size and regional characteristics,with notable impacts observed in both large cities and small to medium-sized cities.Specifically,the influence of high-speed railway is more pronounced in Jiangsu Province compared to Zhejiang and Anhui Provinces.This study systematically elucidates the relationship between the high-speed railway opening and the"dual enhancement of quantity and quality"in urban green technology innovation with-in the Yangtze River Delta region.The conclusions remain robust following rigorous stability tests.