Variables | Level | First difference |
| 0.494 (0.689) | −10.819*** (0.000) |
| −0.167(0.433) | −15.309*** (0.000) |
| 2.363(0.990) | −17.484*** (0.000) |
| 2.648(0.996) | −11.767*** (0.000) |
| 1.152(0.875) | −12.408*** (0.000) |
| 0.640(0.739) | −13.064*** (0.000) |
| 8.527(1.000) | −21.524*** (0.000) |