Does regional carbon market construction promote urban carbon emission efficiency?-taking Fujian carbon emissions trading system as an example

Carbon market construction is a crucial tool in meeting sustainable development goals (SDGs). Based on data from prefecture-level cities in Fujian Province, China, between 2011 and 2020, the SBM model is employed to determine the carbon emission efficiency for each city. Additionally, the event analysis method is deployed to evaluate the influence of the carbon market construction on carbon emission efficiency in Fujian Province, and project carbon emission efficiencies for different scenarios. The findings reveal that: (1) The construction of the carbon market has led to an improvement in carbon emission efficiency in Fujian Province, the duration of this effect needs to be strengthened. (2) No significant difference has been observed in carbon emission efficiency between coastal and inland cities due to the carbon market construction. It is feasible to investigate the formation of a carbon market with distinct local features, ultimately achieving SDGs.