变量 | GTI | GTI | GTI | GTI |
(1) | (2) | (3) | (4) | |
treat × post | -0.0506*** (0.0182) | -0.0677*** (0.0242) | -0.524*** (0.109) | -0.562*** (0.147) |
Sub × treat |
|
| -0.00624** (0.00307) | -0.0106*** (0.00405) |
Sub × treat × post |
|
| 0.0265*** (0.00860) | 0.0324*** (0.0114) |
Sub × post |
|
| 0.00906*** (0.00332) | 0.00769* (0.00442) |
Sub |
|
| 0.0312*** (0.00620) | 0.0161** (0.00774) |
Growth |
| 0.0616 (0.0521) |
| 0.0782 (0.0526) |
Lev |
| -0.0947 (0.0716) |
| 0.0378 (0.0747) |
Ros |
| -0.319*** (0.120) |
| -0.121 (0.122) |
size |
| 0.0704*** (0.0133) |
| 0.0347** (0.0158) |
age |
| -0.0327** (0.0159) |
| -0.0566*** (0.0159) |
TobinQ |
| 0.0506*** (0.0154) |
| 0.0537*** (0.0156) |
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 | 0.002 | 0.022 | 0.035 | 0.047 |