Just guessing, but do you mean
predict(ystar(0,.))
instead of
predict(ystar(o,.))
?
On Thu, Oct 1, 2009 at 3:31 PM, Rich Steinberg <[email protected]> wrote:
> I run a tobit because of left censoring at zero, then want to use margins to
> predict the marginal slope for the observable dependent variable atotgiv.
>
> Everything looks ok except in the output appears
> Expression: E(atotgiv*|atotgiv>otherrelh), predict (ystar(0,.))
>
> The appearance of otherrelh in this expression is mysterious. This is
> another dummy variable used as a control. I didn't program it to look at
> that, and I think it should read, instead, E(atotgiv*|atotgiv>0), etc.
>
> Is this a bug? A mistake on my part? A misunderstanding?
>
> Here is the exact command and headers for the results:
>
> margins, predict(ystar(o,.)) dydx( earn01 assety01 welfare01 nonwelfare01
> annuapprecinh annuownwealthn annuheq )
>
> Average marginal effects Number of obs =
> 4935
> Model VCE : Robust
>
> Expression : E(atotgiv*|atotgiv>otherrelh), predict(ystar(o,.))
> dy/dx w.r.t. : earn01 assety01 welfare01 nonwelfare01 annuapprecinh
> annuownwealthn annuheq
>
> --
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