各位大佬好,本人stata小白,想请大家帮忙看看这个固定效应的结果有没有问题

[cry][cry],谢谢大家

[em23][em23]
| (1) | (2) | (3) | (4) | (5) | (6) | (7) |
| VARIABLES | Y | Y | Y | Y | Y | Y | Y |
| Did | 0.014*** | 0.013*** | 0.013*** | 0.013*** | 0.013*** | 0.013*** | 0.013*** |
| | (0.001) | (0.001) | (0.001) | (0.001) | (0.001) | (0.001) | (0.001) |
| Lnsize | | -0.008*** | -0.007*** | -0.008*** | -0.007*** | -0.007*** | -0.007*** |
| | | (0.000) | (0.000) | (0.000) | (0.000) | (0.000) | (0.000) |
| Lev | | | -0.017*** | -0.017*** | -0.018*** | -0.009*** | -0.009*** |
| | | | (0.002) | (0.002) | (0.002) | (0.002) | (0.002) |
| Growth | | | | 0.003*** | 0.002*** | 0.001* | 0.001* |
| | | | | (0.000) | (0.000) | (0.000) | (0.000) |
| Tat | | | | | 0.010*** | 0.009*** | 0.009*** |
| | | | | | (0.001) | (0.001) | (0.001) |
| Roa | | | | | | 0.068*** | 0.068*** |
| | | | | | | (0.004) | (0.004) |
| Top10 | | | | | | | -0.002 |
| | | | | | | | (0.002) |
| Constant | 0.605*** | 0.787*** | 0.770*** | 0.779*** | 0.751*** | 0.761*** | 0.761*** |
| | (0.001) | (0.008) | (0.008) | (0.008) | (0.008) | (0.008) | (0.008) |
| Observations | 14,196 | 14,196 | 14,196 | 14,196 | 14,196 | 14,196 | 14,196 |
| R-squared | 0.874 | 0.879 | 0.880 | 0.881 | 0.883 | 0.885 | 0.885 |
| Number of id | 1,014 | 1,014 | 1,014 | 1,014 | 1,014 | 1,014 | 1,014 |
| yearfix | YES | YES | YES | YES | YES | YES | YES |
| idfix | YES | YES | YES | YES | YES | YES | YES |