variable | Test type | ADF test value | The critical value at the 1% level | The critical value at the 5% level | The critical value at the 10% level | conclusion |
LnSZ | (0, 0, 3) | 2.661 | −2.606 | −1.945 | −1.613 | non-stationary |
LnSC | (0, 0, 4) | 1.130 | −2.607 | −1.947 | −1.613 | non-stationary |
LnGDP | (c, 0, 5) | −2.385 | −3.555 | −2.916 | −2.596 | non-stationary |
LnCPI | (c, 0, 3) | −1.043 | −3.550 | −2.914 | −2.594 | non-stationary |