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Spatiotemporal Evolution and Influencing Factors of Carbon Emission Efficiency in Western Valley Cities in China

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  • Xinhong Zhang

    (School of Architecture and Art Design, Lanzhou University of Technology, Lanzhou 730050, China)

  • Na Zhang

    (School of Architecture and Art Design, Lanzhou University of Technology, Lanzhou 730050, China)

  • Shihan Wang

    (School of Architecture and Art Design, Lanzhou University of Technology, Lanzhou 730050, China)

  • Jianhong Dong

    (School of Architecture and Art Design, Lanzhou University of Technology, Lanzhou 730050, China)

  • Xiaofeng Pan

    (School of Architecture and Art Design, Lanzhou University of Technology, Lanzhou 730050, China)

Abstract

As China steadily advances its “dual carbon” strategy, understanding the factors influencing carbon emission efficiency (CEE) is crucial for promoting high-quality urban development. This study examines Western Valley cities (WVCs), which play a key role in regional development and exhibit a distinct spatial structure. Using a super-efficiency slacks-based measure (SBM) model and economic and social panel data, we measured CEE and analyzed its spatiotemporal evolution. A geographically and temporally weighted regression (GTWR) was then applied to assess the spatiotemporal heterogeneity of influencing factors. Our findings revealed that the overall CEE of these cities remains relatively low, with a complex pattern of change. While efficiency levels in northern, southern, and central cities have gradually increased, there are notable differences in the quantity and spatial distribution of cities with high, relatively high, relatively low, and low efficiency over time. Additionally, the positive effects of technological investment, road density, population density, and per capita gross domestic product on CEE follow an increasing trend, whereas the negative impacts of energy intensity, green space ratio, secondary industry proportion, land use scale, and gas consumption gradually weaken. Additionally, the magnitude and direction of these effects vary significantly across northern, central, and southern cities. These findings provide important theoretical and practical insights for region-specific strategies aimed at reducing emissions and improving efficiency in WVCs.

Suggested Citation

  • Xinhong Zhang & Na Zhang & Shihan Wang & Jianhong Dong & Xiaofeng Pan, 2025. "Spatiotemporal Evolution and Influencing Factors of Carbon Emission Efficiency in Western Valley Cities in China," Sustainability, MDPI, vol. 17(11), pages 1-21, May.
    • Handle: RePEc:gam:jsusta:v:17:y:2025:i:11:p:5025-:d:1668403
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    References listed on IDEAS

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    1. Tone, Kaoru, 2002. "A slacks-based measure of super-efficiency in data envelopment analysis," European Journal of Operational Research, Elsevier, vol. 143(1), pages 32-41, November.
    2. Cai, Bofeng & Cui, Can & Zhang, Da & Cao, Libin & Wu, Pengcheng & Pang, Lingyun & Zhang, Jihong & Dai, Chunyan, 2019. "China city-level greenhouse gas emissions inventory in 2015 and uncertainty analysis," Applied Energy, Elsevier, vol. 253(C), pages 1-1.
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