| 变量 | (1) | (2) | (3) | (4) | (5) | (6) |
| EPI | Grenov1 | EPI | Grenov2 | EPI | Grenov3 | |
| CEPI | 0.131** (2.145) |
| 0.131** (2.145) |
| 0.131** (2.145) |
|
| EPI |
| 0.153** (2.228) |
| 0.114 (0.465) |
| 0.125* (1.193) |
| Constant | 4.629*** (3.502) | 5.058*** (6.041) | 4.629*** (3.540) | 3.274 (0.433) | 4.629*** (3.509) | 8.269** (2.238) |
| Xit | Yes | Yes | Yes | Yes | Yes | Yes |
| Company | Yes | Yes | Yes | Yes | Yes | Yes |
| Year | Yes | Yes | Yes | Yes | Yes | Yes |
| N | 11,534 | 11,534 | 11,534 | 11,534 | 11,534 | 11,534 |
| R2 | 0.458 | 0.613 | 0.412 | 0.621 | 0.459 | 0.653 |