模型 | 1 | 2 | 3 | 4 |
变量 | Abs | Abs | Abs | Abs |
Imp | −0.5585*** | −0.3145** | −0.3412*** | −0.3661*** |
(0.0000) | (0.0113) | (0.0037) | (0.0079) | |
cf |
|
| −0.9603** | −1.1378** |
|
| (0.0430) | (0.0304) | |
lev |
|
| 0.4612** | 0.6252*** |
|
| (0.0172) | (0.0034) | |
age |
|
| 0.5632* | 0.4886 |
|
| (0.0565) | (0.1911) | |
size |
|
| −0.4068*** | 0.0037 |
|
| (0.0001) | (0.9842) | |
roa |
|
| −0.3836 | −0.5266* |
|
| (0.1458) | (0.0803) | |
ten_holding |
|
| 0.0191* | 0.0236* |
|
| (0.0987) | (0.0987) | |
_cons | 0.4013*** | 1.1473*** | 2.4734*** | −0.8516 |
(0.0001) | (0.0012) | (0.0079) | (0.3952) | |
年份固定 | N | Y | N | Y |
地域固定 | N | Y | N | Y |
adj.R2 | 0.0032 | 0.0556 | 0.0586 | 0.0611 |