Table 4 Robustness test Estimation results (replacement of explanatory variables).
(1) | (2) | (3) | |
|---|---|---|---|
Replace the explained variable | Replace the core explanatory variable | Replacement regression model | |
Transport infrastructure | 0.0436** | 0.0134*** | 0.0014*** |
(2.148) | (3.868) | (5.940) | |
Level of external opening up | 0.0030 | 0.0000 | 0.0000 |
(1.633) | (1.031) | (1.413) | |
Dependence on foreign capital | − 055.4955*** | − 00.7182*** | − 00.6936*** |
(− 5.289) | (− 4.049) | (− 4.438) | |
Degree of government intervention | − 00.0001 | 0.0000 | 0.0000** |
(− 1.283) | (1.437) | (1.989) | |
Human capital level | 0.0001*** | − 00.0000*** | − 00.0000 |
(3.008) | (− 5.865) | (− 1.338) | |
_cons | 4.0567*** | 0.0424*** | − 00.0044 |
(32.422) | (7.895) | (− 0.790) | |
Time effect | YES | YES | YES |
Regional effect | YES | YES | YES |
N | 4221 | 4221 | 4221 |
R2/Log | 0.8706 | 0.9096 | 10776.611 |
