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st: AW: help with margins syntax


From   "Martin Weiss" <martin.weiss1@gmx.de>
To   <statalist@hsphsun2.harvard.edu>
Subject   st: AW: help with margins syntax
Date   Wed, 4 Nov 2009 22:00:58 +0100

<> 

Are you planning to reuse "scale" anywhere else? If not, your code could
just be


*************
summ phi if x==1, mean
gen effect = _b[x]*r(mean)
*************

BTW, where does the "_result" syntax come from? Even -hsearch _result-
struggles to come up with any good matches. This code does still work under
Stata 11, even without changing the -version-:

*************
sysuse auto, clear
su mp
disp_res
di _result(3)
*************


HTH
Martin

-----Ursprüngliche Nachricht-----
Von: owner-statalist@hsphsun2.harvard.edu
[mailto:owner-statalist@hsphsun2.harvard.edu] Im Auftrag von Sergio I Prada
Gesendet: Mittwoch, 4. November 2009 21:32
An: statalist@hsphsun2.harvard.edu
Betreff: st: help with margins syntax

Sorry, here a correction on the code

x is binary and it is the variable of interest in a causal model

tobit y x a b, ll(0)
predict phi, pr(0,.)
summ phi if x==1
scalar define scale = _result(3)
gen effect = _b[x]*scale


-- 
Sergio

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