# Re: st: Re: Marginal Effects after oprobit

 From peter harper <[email protected]> To [email protected] Subject Re: st: Re: Marginal Effects after oprobit Date Sat, 19 Jun 2004 18:30:58 +0100 (BST)

```Thank you. When I typed
..mfx compute, predict (outcome)#3)
'there is no outcome #3
there are only 2 categories
r(111)

This was the message I got.
There should be 3 categories.
When I did a tabulation of the dependent variable
price, I got

ta price

price     Freq.      Percent     Cum
--------------------------------------
1       14,309     57.16        57.16
2        6,693     26.74        83.90
3        4,030     16.10        100.00
____________________________________________
Total     25,032     1000.00

Can anyone tell me what preciesely I need to do to
obtain the marginal effects given the above.

--- jean ries <[email protected]> wrote: > If you
want to obtain the marginal effect for the
> third value of your
> outcome, then type:
>
> .. mfx compute, predict (outcome(#3))
>
> jean
>
>
> > Dear Statalist
> > I am new at doing marginal effects.
> > After I ran the oprobit, I put
> > . mfx compute, predict (outcome(3))
> > outcome() must either be a value of price3,
> > or #1, #2, ...'
> > was the message I got.
> > price3 is my dependent variable.
> >
> > when I put
> > .mfx compute, predict (price3))
> > 'option price3 not allowed'
> >
> > Can anyone tell me what would be correct command
> to
> > find marginal effects for the above.
> >
> >
> >
> >
> >
> >
> >
> >
>
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```