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st: RE: Using Levprdict to predict values of second dataset

From   Nick Cox <[email protected]>
To   "'[email protected]'" <[email protected]>
Subject   st: RE: Using Levprdict to predict values of second dataset
Date   Wed, 14 Mar 2012 15:06:06 +0000

-levpredict- (SSC; Kit Baum) is a user-written command. Note difference of spelling. Please remember that you are asked to explain the provenance of any such command you refer to. 

There are other solutions to this problem, notably -glm, link(log)- which does everything in one step for you and thus eliminates the need for any fix-up program. 

[email protected] 


I am using a regression to estimate log(per capita expenditure) in a
certain subset of my data, let's call it subset "A". I then want to
use the results from that regression to estimate values for a
completely different subset. Usually I can simply regress on the
variables in question and then specify predict X. However, since it is
logged I am using levpredict to reduce transformation bias. I noticed
that levpredict is only creating estimates for the observations used
in the regression. Thus, it is skipping the second subset for which I
am trying to estimate costs. Any suggestions?

(As a note this is a similar issue as to the one I am having with
splines, but I will be testing out the suggestion of another statalist
user later today to address that issue.)

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