下面表格是我的回归结果，因变量是pit，原始数据基本处于2-6的区间内，可是截距项却高达40多，这是否有问题？
| | (1) | (2) | (3) | (4) |
VARIABLES | pit | pit | pit | pit |
| | | | |
wt | -2.085*** | -2.859*** | -2.780*** | -2.605*** |
| (-5.213) | (-5.325) | (-5.164) | (-5.256) |
F.pit | -0.513*** | -0.544*** | -0.529*** | -0.521*** |
| (-4.100) | (-3.894) | (-3.679) | (-3.771) |
yt | 64.61** | 79.83*** | 69.67** | 89.77*** |
| (2.397) | (2.602) | (2.448) | (2.623) |
ut | | -21.98** | -20.38** | -20.03** |
| | (-2.477) | (-2.220) | (-2.170) |
L.oilinflation | | | 0.0293 | 0.0325 |
| | | (1.142) | (1.258) |
D.ex | | | | -209.8 |
| | | | (-1.047) |
Constant | 42.58*** | 146.1*** | 138.1*** | 133.4*** |
| (5.615) | (3.326) | (3.073) | (3.028) |
| | | | |
Observations | 30 | 30 | 30 | 30 |
R-squared | 0.370 | 0.414 | 0.426 | 0.425 |
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