| 变量 | 模型1 | 模型2 |
| 截距项 | 0.272 (0.492) | −0.036 (0.555) |
| TR | 0.274** (0.116) | 0.250** (0.110) |
| LWR | −0.048** (0.021) | −0.049*** (0.020) |
| ES | −0.014 (0.047) | 0.043 (0.049) |
| PY | 0.038** (0.018) | 0.027* (0.017) |
| Tage | −0.001 (0.007) | |
| Tten | −0.046* (0.027) | |
| Tedu | −0.130* (0.072) | |
| Tageh | −0.001 (0.001) | |
| Ttenh | −0.253** (0.076) | |
| Teduh | −0.072* (0.055) | |
| Tmexp | −0.264*** (0.096) | |
| Toexp | −0.469** (0.223) | |
| Tsize | 0.010* (0.009) | |
| Tsex | −0.069 (0.174) | |
| F | 3.461*** | 3.929*** |
| Adj-R2 | 0.122 | 0.320 |
| 观测数 | 118 | 118 |