Prof. Mark E. Schaffer
>
> Thank you for your response to my question, it took me a while to
> install xtoverid. The problem for me was that we have restricted
> access to the computers in our lab and I had to call the people in
> charge of the lab to enable the changes to take place. I was able
> to run the xtoverid but I am not sure what is the null for the
> sargan-hansen statistic. Thank you for your time
>
> Kind Regards,
>
> Jorge Rivera
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