Diagnostic tests
| Test | Null hypothesis | Wald statistic (F) | p-value |
|---|---|---|---|
| W–LGDPPC | No long-run asymmetry | 0.052 | 0.821 |
| W–LCPI | No long-run asymmetry | 32.520 | 0.000 |
| W–INTER | No long-run asymmetry | 41.890 | 0.000 |
| W–ΔLGDPPC | No short-run asymmetry | 5.740 | 0.020 |
| W–ΔLCPI | No short-run asymmetry | 5.780 | 0.019 |
| W–ΔINTER | No short-run asymmetry | 10.510 | 0.002 |
| Test | Null hypothesis | Wald statistic (F) | |
|---|---|---|---|
| W–LGDPPC | No long-run asymmetry | 0.052 | 0.821 |
| W–LCPI | No long-run asymmetry | 32.520 | 0.000 |
| W–INTER | No long-run asymmetry | 41.890 | 0.000 |
| W–ΔLGDPPC | No short-run asymmetry | 5.740 | 0.020 |
| W–ΔLCPI | No short-run asymmetry | 5.780 | 0.019 |
| W–ΔINTER | No short-run asymmetry | 10.510 | 0.002 |
| Test | Null hypothesis | Statistic | p-value |
|---|---|---|---|
| Jarque-Bera | Normality of residuals | 0.079 | 0.961 |
| LM (Breusch–Godfrey) | No serial correlation in residuals | 0.105 | 0.363 |
| Breusch-Pagan-Godfrey | Homoscedasticity of residuals | 28.436 | 0.056 |
| Ramsey reset | The model is correctly specified | 1.999 | 0.163 |
| Durbin–Watson | Test for autocorrelation | 2.014 | |
| Test | Null hypothesis | Statistic | |
|---|---|---|---|
| Jarque-Bera | Normality of residuals | 0.079 | 0.961 |
| LM (Breusch–Godfrey) | No serial correlation in residuals | 0.105 | 0.363 |
| Breusch-Pagan-Godfrey | Homoscedasticity of residuals | 28.436 | 0.056 |
| Ramsey reset | The model is correctly specified | 1.999 | 0.163 |
| Durbin–Watson | Test for autocorrelation | 2.014 | |
Note(s): Centered VIFs (NARDL regressors) range 1.75–4.21 (max 4.21), no material multicollinearity
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