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st: Missing outcome variables - how to deal with these?


From   Tomas M <anon556656@live.ca>
To   <statalist@hsphsun2.harvard.edu>
Subject   st: Missing outcome variables - how to deal with these?
Date   Thu, 21 May 2009 11:09:30 -0700

Line for server

I thank you in advance.  I have a set of data, with missing outcome variables.  I plan to use multinomial logistic regression to analyze the association of my predictor variables with the outcomes.  Say the outcomes are Foreign car, Domestic car, and Missing car (meaning that the place of manufacture is unknown).  The cell size for each of the outcomes is quite similar (i.e. there are as many unspecified cars as Foreign and Domestic).

How would I deal with these missing outcome values in Stata?

Would I drop the missing values from analyses?  Or would I include them as a separate outcome in my multinomial logistic regression models?

Would it also be possible to impute the missing outcome values using some function to predict the outcome based on a given set of independent predictor variables (derived based on the set of full and complete data)?  If so, how would I go about this in Stata?

Thank you for any help!

Tom

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