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Re: st: Standard normal Depvar


From   Nick Cox <n.j.cox@stata.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: Standard normal Depvar
Date   Thu, 06 Aug 2009 09:23:50 -0500

This produces zero or positive values.

Less pedantically, if the variable is already standard normal, why does it need transforming?

Nick

Maarten buis wrote:

--- On Wed, 5/8/09, Evans Jadotte wrote:
I am trying to run a regression where the dependent
variable has a standard normal distribution (those of you
familiar with the "wealth index based on the PCA analysis",
this is my Depvar). However, I need to have the prediction to be all positive to use for transforming.
How can I transform  the Depvar in order  to
force  xb^ to take on positive values?

Here is one option:

reg y x1 x2
predict yhat
sum yhat, meanonly
gen yhatprime = yhat + abs(r(min))

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