| 变量 | (1) | (2) |
| IPO | ECO | |
| Green | 12.812* | 0.012*** |
|
| (1.82) | (4.06) |
| IPO |
| 0.00001* |
|
|
| (1.74) |
| 控制变量 | 是 | 是 |
| 常数项 | −43.962 | −0.151* |
|
| (−0.78) | (−1.80) |
| 观测值 | 390 | 390 |
| R2 | 0.304 | 0.798 |
| 修正R2 | 0.209 | 0.770 |