Does China's carbon emission trading policy have an employment double dividend and a Porter effect?

The implementation of China's carbon emission trading policy has targeted achieving emission reduction and environmental protection as well as promoting economic development and technological innovation. The analysis is made through applying the Difference-in-Differences model and using the Ordinary Least Squares method and the Least Square Dummy Variable method in the paper. Results show that the pilot carbon emission trading policy leads to the expansion of employment scales and the reduction of carbon emissions after controlling for the environmental regulation, population size, economic level, and other important variables. Thus, it implies that an employment double dividend exists. For the Porter effect, it is found in the pilot carbon emission trading policy only without adding any control variable. The effect is further verified based on a robustness checks and a placebo test. Furthermore, from the perspective of market-oriented environmental regulation policy, this study explains that the carbon emission trading system launched in 2017 needs to be improved to spread both the employment double dividend and the Porter effect to the whole nation. China also needs to form a complete set of strict ecological environment protection policies and administrative measures to achieve sustainable development of the economy.