Dependent Variable: LOG(ASKY)   
Method: Least Squares   
Date: 09/19/04   Time: 12:03   
Sample: 2001 2010   
Included observations: 10   
   
Coefficient Std. Error t-Statistic Prob.  
   
LOG(SYKY) 0.938348 0.018104 51.83055 0.0000
   
R-squared -80.652052     Mean dependent var  8.733254
Adjusted R-squared -80.652052     S.D. dependent var  0.058869
S.E. of regression 0.531953     Akaike info criterion  1.670115
Sum squared resid 2.546762     Schwarz criterion  1.700373
Log likelihood -7.350573     Hannan-Quinn criter.  1.636921
Durbin-Watson stat 0.433457   
   
请问可决系数为什么为负，这个模型存在什么问题？