| (1) | (2) | (3) | (4) | (5) | |
|---|---|---|---|---|---|
| 东南半壁 | 中脊带 | 西北半壁 | 枢纽 | 非枢纽 | |
| DID | 0.134*** | -0.055 | -0.049 | 0.115* | 0.048*** |
| (0.021) | (0.034) | (0.129) | (0.069) | (0.018) | |
| _cons | 0.372 | 1.862* | 1.841 | 3.451 | 0.438 |
| (0.503) | (0.979) | (2.034) | (2.893) | (0.433) | |
| 控制变量 | YES | YES | YES | YES | YES |
| 个体固定 | YES | YES | YES | YES | YES |
| 年份固定 | YES | YES | YES | YES | YES |
| N/条 | 2884 | 1194 | 123 | 341 | 3860 |
| adj. R2 | 0.792 | 0.771 | 0.744 | 0.770 | 0.787 |
