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Re: st: AW: mfx-Elasticity for a dummy variable


From   Nyasha Tirivayi <ntirivayi@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: AW: mfx-Elasticity for a dummy variable
Date   Mon, 7 Jun 2010 17:24:30 +0200

Dear Martin

Thanks for the code. Now the results are different. I was using the
wrong code i.e mfx , dyex at(mean) instead of mfx compute,
varlist(logweight) dyex at(mean).

Regards

Nyasha Tirivayi
Maastricht University



On Mon, Jun 7, 2010 at 9:16 AM, Martin Weiss <martin.weiss1@gmx.de> wrote:
>
> <>
>
> What is the difference of your example to this one - where the marginal
> effects do seem to change:
>
>
> *************
> sysuse auto, clear
> gen logprice=log(price)
> gen logweight=log(weight)
> reg logprice length logweight foreign
> mfx compute, varlist(logweight) dydx at(mean)
> mfx compute, varlist(logweight) eyex at(mean)
> mfx compute, varlist(logweight) dyex at(mean)
> mfx compute, varlist(logweight) eydx at(mean)
> *************
>
>
>
> HTH
> Martin
>
> -----Ursprüngliche Nachricht-----
> Von: owner-statalist@hsphsun2.harvard.edu
> [mailto:owner-statalist@hsphsun2.harvard.edu] Im Auftrag von Nyasha Tirivayi
> Gesendet: Montag, 7. Juni 2010 02:50
> An: statalist@hsphsun2.harvard.edu
> Betreff: st: mfx-Elasticity for a dummy variable
>
> Dear All
>
> I am trying to estimate elasticity for a dummy explanatory variable in
> the following model
>
> ln(y) = a + b ln(x) + T + D Z
>
>
>
> I am interested in calculating the elasticity for T a dummy variable
> for a "treatment". What is the formula in stata? Is it mfx,dy/dx or
> mfx,dyex?
>
>
>
> I have done mfx,dyex and the result still remains the coefficient for
> T. Could it be that simple? Or there is another way ?
>
>
>
> Kindly advise
>
>
>
> Nyasha Tirivayi
>
> Maastricht University
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