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st: On marginal effects


From   "Clive Nicholas" <Clive.Nicholas@newcastle.ac.uk>
To   statalist@hsphsun2.harvard.edu
Subject   st: On marginal effects
Date   Fri, 14 Nov 2003 11:51:35 -0000 (GMT)

Nick,

OK, no problem. I should reply by saying that I've attempted to circumvent
this difficulty by tabulating Excel spreadsheets. However, consulting the
literature has not made me entirely clear about the computation. As I
understand it, -dF/dx- as reported in Stata multiplies the probit
coefficients by their corresponding f(z) score. But when I downloaded the
auto-data from Stata, my -probit- calculations of [b*f(z)] didn't match
the marginal effects presented after running both -mfx compute- or
-dprobit- (all of which were MEs of 14 zeros, anyway). Where am I going
wrong??!

C.

> Can't help with the problem, sorry.
>
> As Clive's title may not make sense to
> all on an international list, I'll just
> say that MFI is a British firm offering
> relatively cheap furniture.
>
> Nick
> n.j.cox@durham.ac.uk
>
>
> *
> *   For searches and help try:
> *   http://www.stata.com/support/faqs/res/findit.html
> *   http://www.stata.com/support/statalist/faq
> *   http://www.ats.ucla.edu/stat/stata/
>


Yours,
CLIVE NICHOLAS,
Politics Building,
School of Geography, Politics and Sociology,
University of Newcastle-upon-Tyne,
Newcastle-upon-Tyne,
NE1 7RU,
United Kingdom.
*
*   For searches and help try:
*   http://www.stata.com/support/faqs/res/findit.html
*   http://www.stata.com/support/statalist/faq
*   http://www.ats.ucla.edu/stat/stata/



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