请问这个怎么修正这个回归结果，常数按理说应该是正数，但是回归出来却是负数。谢谢！
Dependent Variable: LNGDP
|
Method: Least Squares
|
Date: 05/19/11 Time: 12:44
|
Sample: 1998 2010
|
Included observations: 13
|
Variable
| Coefficient
| Std. Error
| t-Statistic
| Prob.
|
C
| -11.85985
| 5.825092
| -2.035993
| 0.0666
|
LNFDI
| 3.088871
| 0.827944
| 3.730773
| 0.0033
|
R-squared
| 0.558564
|
Mean dependent var
| 9.868315
|
Adjusted R-squared
| 0.518433
|
S.D. dependent var
| 0.575855
|
S.E. of regression
| 0.399615
|
Akaike info criterion
| 1.144006
|
Sum squared resid
| 1.756611
|
Schwarz criterion
| 1.230922
|
Log likelihood
| -5.436041
|
F-statistic
| 13.91867
|
Durbin-Watson stat
| 1.055518
|
Prob(F-statistic)
| 0.003319
|
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