obs Y G X1 X2 X3
1979 2.000000 7.600000 0.000000 0.000000 0.000000
1980 6.000000 7.800000 1.000000 0.000000 0.000000
1981 2.400000 5.200000 0.000000 0.000000 0.000000
1982 1.900000 9.100000 0.000000 0.000000 0.000000
1983 1.500000 10.90000 0.000000 0.000000 0.000000
1984 2.800000 15.20000 0.000000 0.000000 0.000000
1985 9.300000 13.50000 0.000000 0.000000 0.000000
1986 6.500000 8.800000 0.000000 0.000000 0.000000
1987 7.300000 11.60000 0.000000 0.000000 0.000000
1988 18.80000 11.30000 0.000000 1.000000 0.000000
1989 18.00000 4.100000 0.000000 1.000000 0.000000
1990 3.100000 3.800000 0.000000 0.000000 0.000000
1991 3.400000 9.200000 0.000000 0.000000 0.000000
1992 6.400000 14.20000 0.000000 0.000000 0.000000
1993 14.70000 13.50000 0.000000 0.000000 1.000000
1994 24.10000 12.60000 0.000000 0.000000 1.000000
1995 17.10000 10.50000 0.000000 0.000000 0.000000
1996 8.300000 9.600000 0.000000 0.000000 0.000000
1997 2.800000 8.800000 0.000000 0.000000 0.000000
1998 -0.800000 7.800000 0.000000 0.000000 0.000000
1999 -1.400000 7.100000 0.000000 0.000000 0.000000
2000 0.400000 8.000000 0.000000 0.000000 0.000000
2001 0.700000 7.500000 0.000000 0.000000 0.000000
2002 -0.800000 8.300000 0.000000 0.000000 0.000000
2003 1.200000 9.500000 0.000000 0.000000 0.000000
2004 3.900000 10.10000 0.000000 0.000000 0.000000
2005 1.800000 10.40000 0.000000 0.000000 0.000000
2006 1.500000 11.60000 0.000000 0.000000 0.000000
2007 4.800000 11.90000 0.000000 0.000000 0.000000
2008 5.900000 9.000000 0.000000 0.000000 0.000000
2009 -0.700000 8.700000 0.000000 0.000000 0.000000

Dependent Variable: Y   
Method: Least Squares   
Date: 06/06/10   Time: 14:28   
Sample (adjusted): 1980 2009   
Included observations: 30 after adjustments   
   
Variable Coefficient Std. Error t-Statistic Prob.  
   
Y(-1) 0.537166 0.071882 7.472883 0.0000
G 0.845845 0.170936 4.948309 0.0000
X1 5.559279 2.315537 2.400859 0.0245
X2 12.10817 1.740655 6.956102 0.0000
X3 9.925818 1.824199 5.441192 0.0000
C -7.231206 1.830986 -3.949351 0.0006
   
R-squared 0.904607     Mean dependent var  5.696667
Adjusted R-squared 0.884733     S.D. dependent var  6.575581
S.E. of regression 2.232475     Akaike info criterion  4.620955
Sum squared resid 119.6146     Schwarz criterion  4.901194
Log likelihood -63.31432     Hannan-Quinn criter.  4.710606
F-statistic 45.51798     Durbin-Watson stat  2.039072
Prob(F-statistic) 0.000000   

本人初学计量经济学，也不知道这模型存在哪些问题，请各位DX指教，谢谢