| 指标 | 差分次数 | t | p | 1% | 5% | 10% |
| GDP | 1 | −4.329 | 0.000 | −3.689 | −2.972 | −2.625 |
| IS | 1 | −1.022 | 0.745 | −3.724 | −2.986 | −2.633 |
| 2 | −4.702 | 0.000 | −3.724 | −2.986 | −2.633 |