Beschreibung:
Green and low carbon transition is a broad and profound economic and social systematic change. Green innovation is a critical way to promote energy saving and emission reduction. Has China continuously promoted a carbon emission trading policy to signifcantly promote green innovation cooperation? Taking the implementation of the carbon emission trading pilot policy as a "quasi-natural experiment," this study answers this question by exploring the impact of the policy on green innovation cooperation. Based on data on 274 cities from 2008 to 2020, the multi-time diference-in-differences model is used to evaluate the impact of the policy on green innovation cooperation. The results reveal that the carbon emission trading pilot policy signifcantly improved inter- and intra-city green innovation cooperation through the upgrading efect of industrial structure and the coverage efect of digital fnance compared with the non-pilot cities at the city level. In addition, there are signifcant diferences in the policy efects among cities with diferent degrees of openness to the outside world and command-and-control environmental regulation.