| 变量 | ADF检验值 | 1%临界值 | 5%临界值 | 10%临界值 | 结论 |
| Lny | −2.853 | −3.750 | −3.000 | −2.630 | 平稳 |
| Lnt | −2.797 | −3.750 | −3.000 | −2.630 | 平稳 |
| Lnp | −1.098 | −3.750 | −3.000 | −2.630 | 不平稳 |
| dlny | −1.248 | −3.750 | −3.000 | −2.630 | 不平稳 |
| dlnt | −6.415 | −3.750 | −3.000 | −2.630 | 平稳 |
| dlnp | −5.464 | −3.750 | −3.000 | −2.630 | 平稳 |
| ddlny | −4.473 | −3.750 | −3.000 | −2.630 | 平稳 |
| ddlnt | −6.778 | −3.750 | −3.000 | −2.630 | 平稳 |
| ddlnp | −7.074 | −3.750 | −3.000 | −2.630 | 平稳 |