Table 1.
List of representative policies Beijing-Tianjin-Hebei industrial coordination.
Fig 1.
The average GDP growth rate of the Treatment Group and the Control Group.
Table 2.
Paired sample T test.
Table 3.
Average values of explained variables in each year.
Table 4.
Descriptive statistics of variables.
Table 5.
Model regression results.
Table 6.
Difference in differences estimation results of control variables.
Table 7.
Differential results of GDP growth rate and total factor productivity in Beijing, Tianjin and Hebei.
Fig 2.
The trend of GDP growth rate in Beijing, Tianjin and Hebei.
Fig 3.
The trend of total factor productivity in Beijing, Tianjin and Hebei.
Table 8.
Dual difference results of control variables in Beijing, Tianjin and Hebei.