> -----Original Message-----
> From: owner-statalist@hsphsun2.harvard.edu [mailto:owner-
> statalist@hsphsun2.harvard.edu] On Behalf Of Jiang, Lan
> Sent: Friday, June 23, 2006 12:48 PM
> To: statalist@hsphsun2.harvard.edu
> Subject: st: heckprob mfx
>
> Hi experts,
>
> I am new in stata and even newer in statalist. I am having a heckprob
> problem for your help. As below, I have hospital (dummy var)
> insignificant in the 2nd step modeling insignificant, but when I use mfx
> to calculate the marginal effects, it becomes significant. Here is some
> of the output.
>
> Your advices will be highly appreciated.
>
> Thanks!
>
> Lan
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