Robustness check: results from the Enders–Siklos test for threshold co-integration (Weekly data)
| Variables in the co-integrating relationship | Co-integration test statistics | ||
|---|---|---|---|
| Dependent variable | Independent variables | tmax | Φ |
| lcam | lindo lmalay lphi lsing lthai lviet | −3.705*** | 14.773*** |
| lindo | lcam lmalay lphi lsing lthai lviet | −2.627*** | 10.229*** |
| lmalay | lcam lindo lphi lsing lthai lviet | −2.623*** | 8.048*** |
| lphi | lcam lindo lmalay lsing lthai lviet | −3.499*** | 13.619*** |
| lsing | lcam lindo lmalay lphi lthai lviet | −3.493*** | 12.596*** |
| lthai | lcam lindo lmalay lphi lsing lviet | −3.729*** | 13.799*** |
| lviet | lcam lindo lmalay lphi lsing lthai | −3.104*** | 12.125*** |
| Variables in the co-integrating relationship | Co-integration test statistics | ||
|---|---|---|---|
| Dependent variable | Independent variables | tmax | Φ |
| lcam | lindo lmalay lphi lsing lthai lviet | −3.705*** | 14.773*** |
| lindo | lcam lmalay lphi lsing lthai lviet | −2.627*** | 10.229*** |
| lmalay | lcam lindo lphi lsing lthai lviet | −2.623*** | 8.048*** |
| lphi | lcam lindo lmalay lsing lthai lviet | −3.499*** | 13.619*** |
| lsing | lcam lindo lmalay lphi lthai lviet | −3.493*** | 12.596*** |
| lthai | lcam lindo lmalay lphi lsing lviet | −3.729*** | 13.799*** |
| lviet | lcam lindo lmalay lphi lsing lthai | −3.104*** | 12.125*** |
Note(s): The lag used for each test is determined using the general-to-specific method (Ng and Perron, 1995) with a maximum lag order of 8 allowed. The null hypothesis under test is no co-integration. Approximate critical values for the tmax and Φ tests are taken from Tables 1 and 2 in Enders and Siklos (2001). For the tmax test statistic, critical values are −1.69 for the 10% significance level, −1.89 for the 5% significance level and −2.29 for the 1% significance level. For the Φ test statistic, critical values are approximately 5.21 for the 10% significance level, 6.33 for the 5% significance level and 9.09 for the 1% significance level. Statistical significance is indicated by triple asterisks (***) for the 1% level
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