st: Sum of squares after xtabond2

[jkuhl@worldbank.org]

Hi statalisters,

I need to take out the residual sum of squares after a GMM-estimation. I am
using "xtabond2", and can see that -e(sig2)- produces the std. error of the
residuals, but is there any direct way to take out the RSS as well?
Thanks

Jesper
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