Abstract
Carbon emission trading is an important environmental policy tool to promote carbon emission reduction. With the panel data of carbon emissions trading (CET) pilots, this paper used the spatial difference-in-difference model (SDID) to test whether CET can affect the enterprise environmental responsibility and the spatial spillover effect of carbon emissions trading. The study found that CET can significantly improve the environmental responsibility level of enterprises in pilot areas. The environmental responsibility level of enterprises in surrounding areas are also improved driven by CET. In the time dimension, the role of CET in improving the enterprise environmental responsibility is gradually increasing. The impact of CET on enterprise environmental responsibility has significant heterogeneity in the dimension of ownership attributes and environmental regulation. Promoting corporate environmental protection investment is the main path for CET to improve the enterprise environmental responsibility.