Threatening the Poor? The economic impacts of carbon border adjustment mechanism on developing countries

It is highly necessary to conduct a more detailed assessment of the economic impacts caused by the Carbon Border Adjustment Mechanism (CBAM), especially for numerous developing countries. This study utilizes the input-output (IO) model to evaluate the inequality consequence of CBAM. Results indicate that 1) the overall impact of output decline and production cost increase on non-OECD countries is greater than that on OECD countries; 2) regionally, African countries experience a more severe output decline, while Asian countries see a higher increase in production costs. Apart from BRICS, other developing countries demonstrate low reduction efficiency; 3) a refund mechanism based on historical emission responsibility results in larger benefits for the LDCs. Conversely, green innovation contribution and emission reduction efforts primarily benefit developed economies and large developing countries. We recommend 1) prioritizing assessments for developing countries before designing cross-border climate policy; 2) considering both fairness and efficiency when designing a refund mechanism.