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st: Adding regression variables one step at a time using a macro


From   sara khan <[email protected]>
To   statalist <[email protected]>
Subject   st: Adding regression variables one step at a time using a macro
Date   Wed, 10 Mar 2010 16:52:47 +0000

Dear Statalisters

Please could you advise me on how to write a macro so that I can add
regression variables one step at a time for only non-missing cases. It
is similar to a forward stepwise except that I want to choose which
variables I add.

At the moment, I am doing the following:

Model 1
reg y x1 if y<. & x1<.


Model 2 - add another var
reg y x1 x2 if y<. & x1<. &x2<.

Many thanks
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