|
| (1) | (2) | (3) |
|
| manu | tech | human |
| im | 0.1635*** | 0.4768*** | 0.4444*** |
|
| (0.0595) | (0.1758) | (0.1571) |
| 控制变量 | yes | yes | yes |
| 时间 | yes | yes | yes |
| 地区 | yes | yes | yes |
| Cons | −3.220*** | −7.1548*** | −8.5921*** |
|
| (−5.24) | (1.9986) | (1.6490) |
| 样本数 | 160 | 160 | 160 |
| R2 | 0.9145 | 0.8361 | 0.9671 |