| 变量 | RDS |
| GOVSUB | 6.7964*** |
| (4.628) | |
| Age | −0.1032*** |
| (−5.878) | |
| Size | −0.4032*** |
| (−3.621) | |
| Lea | −1.8790** |
| (−2.082) | |
| Constant | 14.9814*** |
| (6.391) | |
| Observations | 356 |
| Adjusted R-squared | 0.247 |
| F | 30.05 |