变量 | 模型(1) | 模型(2) | 模型(3) | 模型(4) | 模型(5) | 模型(6) | 模型(7) | 模型(8) |
ppe | −0.979*** (−2.974) | −0.844*** (−2.619) | −0.818** (−2.550) | −0.760** (−2.343) | −0.754** (−2.300) | −0.696** (−2.117) | −318.2*** (−4.565) | −322.4*** (−4.926) |
ppe2 | 0.0511** (2.312) | 0.0446** (2.040) | 0.0448* (1.840) | 0.0424* (1.765) | 0.0427* (1.728) | 0.0400* (1.654) | 15.59*** (4.179) | 15.80*** (4.511) |
fd_zc | −0.114*** (−4.825) |
| −0.120*** (−5.778) |
| −0.112*** (−4.882) |
| −0.0678*** (−2.803) |
|
fd_sr |
| −0.115*** (−2.967) |
| −0.129*** (−4.020) |
| −0.114*** (−3.019) |
| −0.0508*** (−2.590) |
cyjg_2 |
|
| 0.0755*** (3.912) | 0.0770*** (4.082) |
|
|
|
|
czhl |
|
|
|
| −0.00663 (−1.028) | −0.00740 (−1.140) |
|
|
控制变量 | YES | YES | YES | YES | YES | YES | YES | YES |
时点固定 | YES | YES | YES | YES | YES | YES | YES | YES |
市个体固定 | YES | YES | YES | YES | YES | YES |
|
|
省个体固定 |
|
|
|
|
|
| YES | YES |
Province × year |
|
|
|
|
|
| YES | YES |
Constant | YES | YES | YES | YES | YES | YES |
|
|
观测值个数 | 4930 | 4930 | 4930 | 4930 | 4930 | 4930 | 4930 | 4930 |
城市个数 | 290 | 290 | 290 | 290 | 290 | 290 |
|
|
省份个数 |
|
|
|
|
|
| 31 | 31 |
Adjusted R2 | 0.869 | 0.868 | 0.871 | 0.870 | 0.869 | 0.868 | 0.886 | 0.886 |