| Variables | IPS Test | Remark | |
| I(0) | I(1) | ||
| Real GDP per capita | −0.6031 | −4.514*** | stationary at first difference |
| Natural Resource Rents per capita | −0.9099 | −5.180*** | stationary at first difference |
| Total Merchandized Exportsper capita | −1.0524 | −5.826*** | stationary at first difference |