| (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 |