Level | Difference | ||||||
Variables | Types of tests | With constant | With constant and trend | Without trend and constant | With constant | With constant and trend | Without trend and constant |
DS | ADF | −2.520*** (0.0070) | 0.2321 (0.2321) | −1.891* | −3.365*** (0.0006) | −3.500** (0.0394) | −3.306*** |
PP | −2.350 (0.1563) | −1.252 (0.8992) | −2.441** | −3.291** (0.0153) | −3.400* (0.0514) | −3.235*** | |
KPSS | 1.23 | 0.299 |
| 0.303*** | 0.0557*** |
| |
PP | ADF | −2.071* (0.0210) | −2.158 (0.5138) | −0.612 | −3.219*** (0.0010) | −3.337* (0.0603) | −3.215*** |
PP | −1.489 (0.5390) | −0.242 (0.9908) | −0.048 | −3.164** (0.0221) | −3.260* (0.0730) | −3.159*** | |
KPSS | 1.21 | 0.303 |
| 0.317*** | 0.104*** |
| |
Int | ADF | −2.806*** (0.0032) | −2.372 (0.3945) | −2.423** | −3.264*** (0.0008) | −3.799** (0.0166) | −3.151*** |
PP | −1.719 (0.4214) | −0.175 (0.9920) | −1.976** | −3.163** (0.0222 | −3.539** (0.0354) | −3.076*** | |
KPSS | 1.35 | 0.389 |
| 0.348*** | 0.0678*** |
| |
Teer | ADF | −1.431* (0.0784) | −4.113*** (0.0060) | 0.650 | −3.880*** (0.0001) | −3.837** (0.0148) | −3.791*** |
PP | −0.485 (0.8949) | −2.424 (0.3667) | 1.317 | −3.717*** (0.0039) | −3.679** (0.0238) | −3.652*** | |
KPSS | 1.79 | 0.116*** |
| 0.0851*** | 0.0783*** |
|