变量 | GTI | GTI | GTI | GTI |
(1) | (2) | (3) | (4) | |
treat × post | -0.189*** (0.0335) | -0.182*** (0.0391) | -1.081*** (0.384) | -0.802* (0.416) |
Sub × treat |
|
| -0.0729*** (0.0270) | -0.0514* (0.0289) |
Sub × treat × post |
|
| 0.0637*** (0.0236) | 0.0536** (0.0258) |
Sub × post |
|
| -0.00988*** (0.00355) | -0.0163*** (0.00459) |
Sub |
|
| 0.0895*** (0.0160) | 0.0724*** (0.0170) |
Growth |
| 0.0135** (0.0556) |
| 0.124** (0.0558) |
Lev |
| 0.0347 (0.0740) |
| 0.0740 (0.0755) |
Ros |
| -0.211 (0.129) |
| -0.114 (0.129) |
size |
| 0.0578*** (0.0137) |
| 0.0199 (0.0158) |
age |
| -0.0583*** (0.0166) |
| -0.0527*** (0.0165) |
TobinQ |
| 0.0543*** (0.0156) |
| 0.0465*** (0.0159) |
企业 | 控制 | 控制 | 控制 | 控制 |
年度 | 控制 | 控制 | 控制 | 控制 |
样本量 | 4400 | 4400 | 4400 | 4400 |
调整R2 | 0.013 | 0.030 | 0.040 | 0.047 |