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st: Re: proper use of if
From
Christopher Baum <[email protected]>
To
"[email protected]" <[email protected]>
Subject
st: Re: proper use of if
Date
Wed, 17 Nov 2010 09:30:24 -0500
On Nov 17, 2010, at 2:33 AM, Nick wrote:
> If you read -help predict- you will see that it explains that -predict- also takes -if- if you wish. As you did not specify -if-, predictions were generated for the whole dataset, which people sometimes do want. So, just repeat -if isin2 == 1- on the -predict-.
A perhaps even better solution is to predict... if e(sample), as that will not only incorporate the if condition on the regression, but avoid predicting for any observations which could not be included in the estimation.
Kit
Kit Baum | Boston College Economics & DIW Berlin | http://ideas.repec.org/e/pba1.html
An Introduction to Stata Programming | http://www.stata-press.com/books/isp.html
An Introduction to Modern Econometrics Using Stata | http://www.stata-press.com/books/imeus.html
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