Bookmark and Share

Notice: On March 31, it was announced that Statalist is moving from an email list to a forum. The old list will shut down on April 23, and its replacement, statalist.org is already up and running.


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

st: Re: AW: RE: AW: Exclude some observations from a sample in a regression


From   Kit Baum <baum@bc.edu>
To   statalist@hsphsun2.harvard.edu
Subject   st: Re: AW: RE: AW: Exclude some observations from a sample in a regression
Date   Thu, 8 Apr 2010 08:23:31 -0400

On Apr 8, 2010, at 2:33 AM, Claude wrote:

> if foreign==foreign


This is a meaningless (if harmless) if qualifier, as it will always evaluate to true, whether foreign is 0, 1 or missing. The if "command" is recognized; but you've told it to use all cases for which foreign equals itself, which cannot exclude anything.

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 1996–2014 StataCorp LP   |   Terms of use   |   Privacy   |   Contact us   |   Site index