Can policy achieve environmental fairness and environmental improvement? Evidence from the Xin’an River project in China

In a river basin across regions, is environmental improvement in downstream areas based on actions that negatively impact economic development and social welfare in upstream areas? This paper takes the pilot of Transverse Eco-compensation Mechanism (TECM) in Xin'an River of China as a quasi-natural experiment and uses the difference-in-differences strategy to estimate the impact of TECM on environmental inequality. We find that the government’s environmental policy may lead to more environmental inequality，which is often overlooked. Our results show that the pilot of TECM depresses the upstream economy, reduces upstream resident income, especially rural residents, and widens the regional income gap between the upstream and downstream. Heterogeneous tests confirm our findings. Our mechanism test shows that the industries’ shutting down and relocation are the main driving forces for the regional environmental inequality in the short term. Therefore, in implementing future TECM, the upstream government needs to pay attention to the economic slowdown and the subsequent unemployment and resident welfare loss. The central and downstream governments should help the upstream regions upgrade the industrial structure, rather than just pay compensation funds, thereby reducing the resulting environmental inequality. Our findings have important policy implications for the treatment of trans-regional river pollution.