what does dynare return as "Variance"?

[Tatiana57]

I have written the simplest code with TFP shock, where rhoA=0.97 is persistence.
The theoretical variance should be
theoretical variance=1/(1-rhoA^2)=16.9205
But dynare returns:

"
MOMENTS OF SIMULATED VARIABLES

VARIABLE MEAN STD. DEV. VARIANCE SKEWNESS KURTOSIS
A -0.240878 4.598555 21.146709 0.434870 0.629554
"
so, what is "21.146709", and why mean is negative?

[jpfeifer]

In your case it returns moments from a simulation as periods>0.
You used simulated moments with

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periods=1000;

This is not sufficient for asymptotics. Use e.g.

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periods=100000

and you will be much closer to the theoretical values