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I have two models estimated via GMM, how do I compare them?

Presumably with AIC, BIC (which is the case for OLS). However, information criterion is not provided in the output (information criteria is provided with OLS). Is there a way to get the information criteria using GMM methods?

If information criteria is not available in GMM, could I choose the model with the best R^2 & lowest standard error of the regression?

Apology if I am asking a silly question.

There is no simple answer.
http://www.ssc.wisc.edu/~kwest/publicat ... nomics.pdf

Hi guys!
I have estimated c ar(1) ar(12) model, because there was certain autocorrelation on k=12. Its monthly data, series has one unit root.
How to write this model?
reduced ARIMA(12,1,0) or
ARIMA(1,1,0)x(1,0,0)?

I must say sar(12) is not significant.