Influence of a pilot carbon trading policy on enterprises' low-carbon innovation in China

China's pilot carbon trading policy is expected to be both efficient and flexible in reducing carbon emissions through incentivising low-carbon innovation. This paper analyses the effects of this pilot policy on low-carbon innovation using a difference-in-difference model, based on a sample of selected enterprises and carrying out a series of robustness tests to corroborate the results. The analysis shows that the pilot carbon trading policy is predicted to have a significantly positive effect on the low-carbon innovation of enterprises that fall under its scope, notably by alleviating obstacles to the financing of low-carbon innovation. Furthermore, a heterogeneity analysis of enterprises' characteristics and carbon allowance allocation methods in different pilots indicates that the effect of the pilot carbon trading policy on enterprises' low-carbon innovation will be reflected mainly in enterprises in China's eastern provinces, and in state-owned enterprises. Compared with the grandfathering and historical intensity allocation methods, the findings of this study suggest that the extent of low-carbon innovation is significantly greater when the benchmarking method is used. The results of this paper offer some key insights into improving the policy design of a nationwide carbon trading market in China, as well as a reference point for other countries and regions, especially developing countries, in establishing a carbon trading market.