Table 4. Summary of Key Diagnostic Test Results.
| Test | Model 1 (ROA) | Model 2 (ROE) | Conclusion |
|---|---|---|---|
| Unit Root Test | Mixed stationarity | ||
| Kao Cointegration | ADF=-7.39 (p=0.000) | ADF=-7.39 (p=0.000) | A long-run relationship exists. |
| VIF Test | Max VIF = 4.92 | Max VIF = 4.92 | No multicollinearity. |
| Breusch-Pagan Het. | χ² =664.03 (p=0.000) | χ²=616.08 (p=0.000) | Heteroskedasticity is present; FGLS estimation is required. |
| Normality Test | Jarque-Bera = 2.01 (p = 0.365) | Jarque-Bera = 1.16 (p = 0.239) | Residuals are normally distributed. |
| Breusch-Godfrey Serial Corr. | F=1.96 (p=0.326) | F=1.36 (p=0.562) | No serial correlation. |
| Hausman Specification | χ²=20.30(p=0.000) | χ²=20.32 (p=0.000) | The Fixed Effects model is deemed appropriate. |