| Test | GDP | IMR | ||
| Levels | 1st difference | Levels | 1st difference | |
| Breitung | 7.92602 (1.0000) | −10.1522*** (0.0000) | 8.44755 (1.0000) | −6.27302*** (0.0000) |
| Im, Pesaran and Shin | 0.87115 (0.8082) | −15.6485*** (0.0000) | 0.36060 (0.6408) | −5.30874*** (0.0000) |
| ADF-Fisher | 50.6210 (0.6779) | 339.677*** (0.0000) | 66.9435 (0.1502) | 156.780*** (0.0000) |