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Re: st: program to measure missing values of one variable againstothers


From   Gary Longton <glongton@fhcrc.org>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: program to measure missing values of one variable againstothers
Date   Wed, 17 Nov 2004 09:31:44 -0800

David Kantor wrote:

I will need a program to take a varlist, and for each variable, see how badly it is populated with missing values with respect to all the others.

The purpose is to see which variables are the spoilers -- the ones that cause the most damage in terms of limiting the usable set of observations in an analysis. Thus, it is not enough to say that x has 98 missing values. If they are mostly the same cases as have missing values in other variables, then it's not a problem. If they are largely in cases different from those with missing values in other variables, then it is a problem.

I can do this with not too much effort, but I ask in case someone knows of an existing program for this purpose. (Or is there something in standard Stata?)
Jeroen Weesie's -mvpatterns- (STB 61, 2001) should do what you want - it takes a varlist and provides the frequencies of all missing value patterns for variables in the list. "findit mvpatterns" will point you to it.

- Gary




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