| Indicator | Model 1 | Model 2 | Model 3 | Model 4 |
| chi2 | 4332.85 | 2250.72 | 2414.52 | 2556.89 |
| Prob > chi2 | 0.0000 | 0.0000 | 0.0000 | 0.0000 |
| F | 17.772 | 17.835 | 17.849 | 17.268 |
| Prob > F | 0.0000 | 0.0000 | 0.0001 | 0.0000 |