Influence of national high-tech zones on enterprise green innovation:empirical data based on differences-in-differences
To verify the influence of national high-tech zones on the improvment of the efficiency of green innovation in enterprises,based on datas of listed companies in Chinese A-share market from 2007 to 2022,the vector information of enterprises within national high-tech zones was effectively identified using geographic information system and baidu map.The differences-in-differences(DID)method was adopted to examine the policy effects of national high-tech zones on enterprise green innovation.The research findings show that the establishment of national high-tech zones can significantly enhance the level of green innovation of enterprises,with the number of green patent applications increasing by approximately 3.5%compared to that before the establishment of such zones.In addition,compared to enterprise invention patents,the implementation of policies related to the establishment of national high-tech zones has a more significant promoting effect on the number of utility model patent applications of enterprises.
national high-tech zonesgreen innovationdifferences-in-differences
NETL
NSTL
万方数据
