| Equation (1) | ||||
| Beta | Coef. | Std. errors | Z | P-value |
| GDP | 1 |
|
|
|
| imports | −0.840*** | 0.113 | −7.48 | 0.000 |
| Exports | −0.807*** | 0.046 | −17.51 | 0.000 |
| Constant | −1.29e+09 |
|
|
|
| Equation (2) | ||||
| Beta | Coef | Std. errors | Z | P-value |
| Imports | 1 |
|
|
|
| Exports | 1.041*** | 0.204 | 5.09 | 0.000 |
| GDP | −1.238*** | 0.073 | −17.06 | 0.000 |
| Constant | 1.60e+09 |
|
|
|
| Equation (3) | ||||
| Beta | Coef. | Std. errors | Z | P-value |
| Exports | 1 |
|
|
|
| Imports | 0.961*** | 0.116 | 8.30 | 0.000 |
| GDP | −1.190*** | 0.100 | −11.89 | 0.000 |
| Constant | 1.54e+09 |
|
|
|