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The nonlinear relationship between air quality and housing prices by machine learning

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Abstract 

Using a dataset encompassing 228 cities in China spanning from 2005 to 2019, this study explores the nonlinear relationship between air quality and housing prices and devises a strategy that incorporates the instrumental variable and machine learning to address the endogeneity issue. Both traditional models and machine learning models find air pollution affects housing prices in a diminishing manner. The negative impact of air pollution on housing prices decreases when the degree of air pollution intensifies. Such a characteristic is more pronounced in Eastern China and cities with fewer land resource constraints and larger populations. Mechanism analysis also reveals that air pollution could affect residents’ perceived air quality and the industrial structure, further contributing to the nonlinear relationship between air quality and housing prices. The further SHapley Additive exPlanations (SHAP) evaluates the importance of air quality in determining housing prices and finds that air quality’s contribution outweighs educational and medical resources. The contribution of air quality also shows a distinct regional disparity and has become increasingly important in recent years. The findings refine the benefit assessment accuracy related to air quality improvement.

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Acknowledgements

This research is also supported by ZJU-CMZJ Joint Lab on Data Intelligence and Urban Future and China Institute of Urbanization Zhejiang University.

Funding

This study was funded by National Natural Science Foundation of China (No. 72004199) and Natural Science Foundation of Zhejiang Province (No. LQ21G030012).

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All authors contributed to the study conception and design. Data collection and analysis were performed by Sheng Pan, Zhiyuan Li, and Ziqing Li. The first draft of the manuscript was written by Weiwen Zhang, Sheng Pan, and Zhaoyingzi Dong. All authors commented on previous versions of the manuscript. All authors read and approved the final manuscript.

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Correspondence to Zhaoyingzi Dong.

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Zhang, W., Pan, S., Li, Z. et al. The nonlinear relationship between air quality and housing prices by machine learning. Environ Sci Pollut Res 30, 114375–114390 (2023). https://doi.org/10.1007/s11356-023-30123-5

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  • DOI: https://doi.org/10.1007/s11356-023-30123-5

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