Variables | Type of test | No constant and no trend | with constant and no trend | with constant and trend | Critical values at 5% | Test statistics | Decision |
| ADF | not | not | not | −1.950687 | 0.0001 | NS |
EXPC | PP | not | not | not | −1.949856 | −2.517124 | I(I) |
| KPSS |
| yes | yes | 0.463000 | 0.325518 | I(I) |
| ADF | not | not | not | −1.952910 | 0.592575 | NS |
GFCF | PP | not | not | not | −1.949856 | −1.836241 | NS |
| KPSS |
| yes | yes | 0.463000 | 0.370463 | I(I) |
| ADF | yes | yes | not | −1.950117 | −3.867436 | I(I) |
FDI | PP | yes | yes | not | −1.949856 | −3.004153 | I(I) |
| KPSS |
| yes | yes | 0.463000 | 0.182432 | I(I) |
| ADF | not | yes | yes | −2.960411 | −7.064032 | I(I) |
POPCO | PP | not | yes | yes | −2.941145 | −4.203295 | I(I) |
| KPSS |
| not | not | 0.463000 | 0.537019 | NS |