Core Insights - The implementation of low-carbon city pilot policies since 2010 has significantly promoted local carbon reduction and green economic growth, with a 38.7% increase in GDP per unit carbon emission for each unit increase in policy effectiveness [2] - The effectiveness of these policies varies based on marketization level, environmental regulation intensity, and the type of resource-based cities, indicating that these characteristics are crucial for policy outcomes [5][6] Policy Implementation Effects - The pilot policies have led to a shift in focus from energy consumption management to energy-saving project applications, with a notable increase in policy issuance over time [2] - High-intensity low-carbon policies create environmental barriers to market entry, effectively excluding high-carbon and high-pollution enterprises, thus maintaining a "green concentration" within industries [2] - The upgrading of industrial structures is essential for implementing pilot policies and promoting green economic growth, although the impact on resource allocation efficiency remains limited due to single assessment targets faced by local governments [3] Green Technology Innovation - The policies have effectively increased green technology innovation, with a 49.5% rise in green invention patent applications and a 41.8% increase in practical green patents for each unit increase in policy evaluation index [4] Heterogeneity Analysis - The marketization level shows a "U-shaped" relationship with policy effectiveness, where initial increases in marketization enhance resource allocation efficiency, but excessive marketization may reduce carbon reduction capabilities [5][6] - Resource-based cities exhibit better policy effects due to larger carbon emission baselines, with growth-type cities showing the highest effectiveness, followed by mature, declining, and regenerating types [7] Policy Recommendations - Emphasizing top-level design to promote technological innovation and the development of green industries is crucial, with AI technology playing a significant role in optimizing carbon reduction strategies [11] - Strengthening policy tracking and establishing a data-sharing platform can enhance local governments' focus on low-carbon development planning [12] - Rationalizing environmental decentralization can reduce policy execution uncertainties and improve effectiveness [13] - Tailoring policies to local conditions and promoting successful case studies can mitigate the risks of rigid low-carbon policies [14]