Results of the Augmented Dicky–Fuller and Phillips–Peron unit root tests
| Variables | ADF | PP | ||||||
|---|---|---|---|---|---|---|---|---|
| I(0) | I(1) | I(0) | I(1) | |||||
| I.C. | I.C. and Tr. | I.C | I.C. and Tr. | I.C. | I.C. and Tr. | I.C. | I.C. and Tr. | |
| LnGDP | 0.50 | −1.32 | −6.12** | −6.23** | 0.50 | −1.40 | −6.15** | −6.24** |
| CGD | −1.4 | −1.5 | −4.2*** | −4.1** | −1.6 | −1.7 | −4.2*** | −4.1** |
| IPED | −1.6 | −2.1 | −7.4*** | −4.5*** | −1.6 | −2.1 | −7.1*** | −7.0*** |
| FDI | −1.6 | −2.5 | −4.4** | −4.4** | −1.7 | −2.1 | −4.3** | −4.3** |
| Variables | ADF | PP | ||||||
|---|---|---|---|---|---|---|---|---|
| I(0) | I(1) | I(0) | I(1) | |||||
| I.C. | I.C. and Tr. | I.C | I.C. and Tr. | I.C. | I.C. and Tr. | I.C. | I.C. and Tr. | |
| LnGDP | 0.50 | −1.32 | −6.12** | −6.23** | 0.50 | −1.40 | −6.15** | −6.24** |
| CGD | −1.4 | −1.5 | −4.2*** | −4.1** | −1.6 | −1.7 | −4.2*** | −4.1** |
| IPED | −1.6 | −2.1 | −7.4*** | −4.5*** | −1.6 | −2.1 | −7.1*** | −7.0*** |
| FDI | −1.6 | −2.5 | −4.4** | −4.4** | −1.7 | −2.1 | −4.3** | −4.3** |
Note(s): *, ** and *** denote the absence of unit root at 10, 5 and 1% levels, respectively
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