Thank you Kit, it works. You' re wonderful
----------------------------------------
> From: [email protected]
> To: [email protected]
> Subject: st: How do I keep the same sample size without deleting cases?
> Date: Sat, 20 Jun 2009 06:47:34 -0400
>
> <>
> Dimitris said
>
> I am a new stata user, so excuse me for my ignorance...I am
> using panel data and I want to do my descriptive analysis and my
> exploratory analysis having (of course) the same number of
> observations. I first rum my prbot model and then I make tables with
> means using e(sample in my "if" statement and everything goes well.
> However when I do crostabs (using ta or table) the number of
> observations is different (higher to be exact). I have observed, while
> making the means tables, that when I dont include in my descriptives
> all the variables used in the probit model then the sample size
> changes. How can I keep the sample size the same without deleting the
> missings?
>
>
> sysuse auto
> probit foreign rep78 price mpg weight // drops 5 obs due to missings
> on rep78
> g byte want = e(sample)
> tab mpg foreign if want
> su displacement turn if want
>
> etc.
>
> 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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> * For searches and help try:
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> * http://www.stata.com/support/statalist/faq
> * http://www.ats.ucla.edu/stat/stata/
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