Re: st: margins at every observation

[Thomas <tpt21@cam.ac.uk>]

> --- On Wed, 13/10/10, Thomas  wrote:
> > But it does not seem to allow negative values for
> > the variable  that is included in -over-. Is there
> > any way around this?
> Yeah, but it all gets too complicated for my taste.
> I would just live with the fact that -margins- is not
> inteded to do what you want it to do, and instead
> do it manually.
>
> However, if you want to stick to the -margins- route,
> here is a solution:
>
> *--------- begin example --------
> sysuse auto, clear
>
> // create negative values
> sum mpg , detail
> replace mpg = mpg - r(p50)
>
> // mpgid has a separate positive integers
> // value for each value of mpg
> egen mpgid = group(mpg), label
>
> reg price c.mpg##c.mpg
> margins, dydx(mpg) over(mpgid)
>
> // legend:
> label list mpgid
> *---------- end example ----------
>
> Hope this helps,
> Maarten
>
> --------------------------
> Maarten L. Buis
> Institut fuer Soziologie
> Universitaet Tuebingen
> Wilhelmstrasse 36
> 72074 Tuebingen
> Germany
>
> http://www.maartenbuis.nl
> --------------------------
>
>
>
>
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Ok that is decided then. Thanks.
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