Based on a theoretical explanation of the impact of the coordinated development of Beijing-Tianjin-Hebei on eco-environmental quality, this paper takes the first batch of pilot cities implemented in 2015 are regarded as a quasi-natural experiment. Based on the panel data of 61 prefecture-level cities from 2011 to 2021. This paper empirically testes the impact of the coordinated development of Beijing-Tianjin-Hebei on eco-environmental quality using a differences-in-differences model, and analyze the heterogeneity. The findings are as follows: the coordinated development of the Beijing-Tianjin-Hebei region improve the eco-environmental quality, and this result still holds after robustness tests such as the propensity score matching and changing time window; heterogeneity analysis shows that the larger the population size of a city, the greater the impact of coordinated development of Beijing-Tianjin-Hebei region on ecological environment quality . Therefore, government departments should perform their functions, give full play to the role of the coordinated development of Beijing-Tianjin-Hebei in improving the quality of the ecological environment, implement differentiated eco-environment coordinated governance plan based on local conditions, and provide Ecological environment of higher quality.

Peifang Tian. Temporal and Spatial Changes of Ecological Environment Quality and Its Influencing Factors in Beijing-Tianjin-Hebei Region. Nature Environmental Protection (2023), Vol. 4, Issue 2: 68-78. https://doi.org/10.38007/NEP.2023.040208.

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