Abstract
Central city construction (CCC) functions as an important policy instrument for facilitating China’s green transformation, while urban agglomerations serve as the primary spatial carriers of this process. In the context of low land utilization efficiency and environmental pressure, this study examines how CCC influences urban land green utilization efficiency (ULGUE) within urban agglomerations (UAs). Using panel data from 2006 to 2021 for 213 cities across 19 Chinese UAs, this study measures ULGUE using the super-efficiency SBM model and investigates the impact of CCC on ULGUE via a difference-in-differences (DID) model. ULGUE is significantly enhanced by CCC, and the effect of CCC on ULGUE varies noticeably. CCC can further optimize land resource allocation and utilization efficiency by enhancing green innovation vitality, promoting industrial upgrading, accelerating internet agglomeration, and improving the urbanization level. CCC is a major national development plan that not only greatly advances new-type urbanization but also promotes the integrated and coordinated growth of UAs. Furthermore, it provides a productive methodology and theoretical reference for urban spatial structure optimization and sustainable land use in other developing countries.
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The datasets used and analyzed in the current study, together with the analytical code supporting the results of this study, are available from the corresponding author upon reasonable request.
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Acknowledgements
The research was supported by the Yibin Philosophy and Social Sciences Fund (YB25Z01), the Research Project of Chengdu Water Ecological Civilization Construction Center (SST2025-16), the State Key Laboratory of Geohazard Prevention and Geoenvironment Protection Independent Research Project (SKLGP2024Z023), the Open Foundation of the Research Center for Human Geography of Tibetan Plateau and Its Eastern Slope (Chengdu University of Technology) (RWDL2025-ZC001; RWDL2025-ZC002) and the Chengdu University of Technology Post-graduate Innovative Cultivation Program (2025BJCX-LS028; 2025BJCX-LS029).The authors would like to sincerely acknowledge reviewers for their valuable suggestions, which significantly improved the study.
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Conceptualization and methodology: YX QK and HH; Software, formal analysis, and Writing—original draft: QK; Validation: HY; Investigation: QK and HY; Resources: YX and MC; Data curation: LC and MC; Writing—review and editing: YX, QK, HY, HH, LC, and MC; Visualization: QK and HY; Supervision: YX and HH; Project administration: YX and HH. All authors have read and agreed to the published version of the manuscript.
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Xiao, Y., Kong, Q., Yang, H. et al. Central city construction and urban land green utilization efficiency: evidence from Chinese urban agglomerations. Humanit Soc Sci Commun (2026). https://doi.org/10.1057/s41599-026-07066-6
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DOI: https://doi.org/10.1057/s41599-026-07066-6
