那我把缺失值删掉试试
但是这就把面板数据的结构破坏了,就是单纯的把各期的不同数据堆在一起,如
| 2 | 200201 | -1.018405 |
| 2 | 200202 | -6.729818 |
| 2 | 200203 | -0.453347 |
| 2 | 200204 | -1.926564 |
| 2 | 200301 | 11.756958 |
| 2 | 200302 | 3.8109705 |
| 2 | 200303 | 8.5133268 |
| 2 | 200304 | 3.8447021 |
| 2 | 200401 | 20.561738 |
| 2 | 200402 | 3.3021255 |
| 2 | 200403 | 11.928562 |
| 2 | 200404 | 6.5496596 |
| 2 | 200501 | 11.87486 |
| 2 | 200502 | -3.581763 |
| 2 | 200503 | 3.8940557 |
| 2 | 200504 | 19.251195 |
| 2 | 200601 | 37.043508 |
| 2 | 200602 | -42.14414 |
| 2 | 200603 | 32.574777 |
| 2 | 200604 | 55.975845 |
| 2 | 200701 | -8.773714 |
| 2 | 200702 | 50.657606 |
| 2 | 200703 | 10.34865 |
| 2 | 200704 | 3.8346516 |
| 2 | 200801 | 21.340653 |
| 2 | 200802 | -24.38543 |
| 6 | 200201 | 0.0331951 |
| 6 | 200601 | 69.444508 |
| 6 | 200602 | -3.564242 |
| 6 | 200604 | 4.353045 |
| 6 | 200702 | 55.682706 |
| 6 | 200703 | -5.50265 |
| 6 | 200704 | -21.39105 |
| 6 | 200801 | 27.217453 |
这样执行单位根检验,出来的也不是panel unit root test而是group unit root test了,是不是必须得针对平衡面板数据啊?