“Research on Structural Characteristics and Optimization of Policy Mix for Pollution Reduction and Carbon Abatement in Chengdu-Chongqing Twin-City Economic Circle”. Economics and Public Policy 2, no. 1 (May 12, 2026): 1–15. Accessed June 5, 2026. https://academics.erytis.com/index.php/epp/article/view/507.