 Thank you Bastien, and Dr. Bivand!
I appreciate your suggestions.
Milan
On Friday, April 11, 2014 6:58 AM, Bastien Ferland-Raymond <Bastien.Ferland-Raymond@mrn.gouv.qc.ca> wrote:
  
Hello,

I'm not familliar with SAR and CAR model, but smaller AIC is better than
larger AIC.  The important thing here is to have the same Y vector (which
you have)

See the Burnham and Anderson's book for a full, well explained explanation
on AIC:
Burnham, K. P.; Anderson, D. R. (2002), Model Selection and Multimodel
Inference: A Practical Information-Theoretic Approach (2nd ed.),
Springer-Verlag, 


Bastien



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