# st: RE: RE: Simulation: marginal effect at the 5th percentile

 From "Martin Weiss" To Subject st: RE: RE: Simulation: marginal effect at the 5th percentile Date Tue, 2 Dec 2008 15:25:17 +0100

```Line for the server...

On the occasion of this thread: Is capitalization in the names of returned
results really advisable? - e(Xmfx_dydx)- may be used less frequently, but I
remember being bitten by -r(var)- as opposed to -r(Var)- after -summ-. What
is the benefit of a capitalized "V" here?

HTH
Martin

-----Original Message-----
From: owner-statalist@hsphsun2.harvard.edu
[mailto:owner-statalist@hsphsun2.harvard.edu] On Behalf Of Martin Weiss
Sent: Tuesday, December 02, 2008 1:28 PM
To: statalist@hsphsun2.harvard.edu
Subject: st: RE: Simulation: marginal effect at the 5th percentile

There were unbalanced parantheses in my code. Thanks to Kit Baum for
pointing this out!

***********
cap prog drop simnorm

prog simnorm, rclass
vers 9.0
*construct data
drop _all
set obs 1000
g X2=uniform()*3
g X3=uniform()*0.5+2
g Y=uniform()>0.7

gen a = 3*invnorm(uniform())+ 5 //so mean 5, sd 3
_pctile a, p(5)
loc p5 = r(r1)
logit Y a X2 X3, robust
mfx, predict(p) at(mean a=`p5' X2=0)
mat dydxmfx = e(Xmfx_dydx)
ret sca dydxmfxap5 = dydxmfx[1,1]
end

simulate dydxmfxap5 = r(dydxmfxap5), reps(100) : simnorm
*saving("C:\data\sima.dta", replace)
***********

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```