Bookmark and Share

Notice: On April 23, 2014, Statalist moved from an email list to a forum, based at statalist.org.


[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

st: re: proper use of if


From   Christopher Baum <kit.baum@bc.edu>
To   <statalist@hsphsun2.harvard.edu>
Subject   st: re: proper use of if
Date   Wed, 17 Nov 2010 11:12:44 -0500

<>
Nick said

I agree that -if e(sample)- is a good piece of syntax to know, but otherwise I don't see a practical difference here. 

If the observations couldn't be included, the result will be missing and the consequence is the same.


Well, not quite so. If the dependent variable was missing but the RHS variables were not, -predict- could create a prediction for those observations.  Repeating the if condition would not catch that, but e(sample) would.

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


*
*   For searches and help try:
*   http://www.stata.com/help.cgi?search
*   http://www.stata.com/support/statalist/faq
*   http://www.ats.ucla.edu/stat/stata/


© Copyright 1996–2018 StataCorp LLC   |   Terms of use   |   Privacy   |   Contact us   |   Site index