The role of China's carbon emission trading system in economic decarbonization: Evidence from Chinese prefecture-level cities

Based on the panel data from 283 prefecture-level cities in China between 2009 and 2019, this study examines the impact of China's carbon emissions trading system on reducing carbon emissions and its mechanisms, using the PSM-DID method. The findings demonstrate that the carbon emissions trading system can effectively decrease the total carbon emissions in pilot cities in China, and has a positive spatial spillover effect on neighboring cities of the pilot areas. The carbon emission trading system primarily reduces carbon emission by incentivizing businesses to implement eco-friendly practices and improve the industrial structure of pilot cities. Increased financial marketisation can promote the carbon emission reduction effects of the trading system. The impact of the carbon emission trading system on old industrial base cities and inland cities is more significant than those on non-old industrial base cities and coastal cities.