| 变量 | 模型三 | 模型四 |
| ln_GPCP | 15.356*** | 15.122*** |
|
| (7.78) | (8.05) |
| ln_GPE |
| 6.848*** |
|
|
| (4.01) |
| Constant | −118.205*** | −202.258*** |
|
| (−5.88) | (−6.68) |
| Observations | 279 | 279 |
| R-squared | 0.185 | 0.227 |
| Ftest | 0 | 0 |
| r2_a | 0.182 | 0.221 |
| F | 60.53 | 37.50 |