求助 我做了个 1990-2009年的专利与gdp关系的论文
做adf检验 做了 一遍又一遍 咋就不平稳呢 是数据有问题吗 ,求大牛帮忙 做一下 ?在线等 谢谢啦 着急啊
| LNPGDP | LNPSQL |
| 6.572562224 | 7.114769448 |
| 6.649158662 | 7.39387829 |
| 6.785134762 | 7.752335163 |
| 6.952217207 | 7.913155186 |
| 7.192793954 | 7.887959337 |
| 7.462955176 | 7.851271997 |
| 7.721131217 | 7.928766322 |
| 7.867128642 | 7.879291485 |
| 7.944294677 | 7.899153483 |
| 8.001599273 | 8.002024818 |
| 8.077907811 | 8.041091004 |
| 8.124612717 | 8.207946941 |
| 8.214060229 | 8.387539983 |
| 8.311343387 | 8.511577453 |
| 8.438448976 | 8.500860537 |
| 8.611042988 | 8.707813551 |
| 8.719299185 | 8.784927626 |
| 8.813868334 | 8.88765269 |
| 8.969454638 | 9.030136571 |
| 9.033703075 | 9.106534203 |