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st: identifying comparison groups with similar distributions along one metric


From   "Kate Rohrbaugh" <krohrbaugh@ipaglobal.com>
To   <statalist@hsphsun2.harvard.edu>
Subject   st: identifying comparison groups with similar distributions along one metric
Date   Tue, 20 Oct 2009 10:45:22 -0400

This is my first posting to Statalist, so I ask for forgiveness in any breaks in protocol.  

I have a dataset of about 300 observations and I am going to separate them into 4 groups -- not totally equal in size but based on certain characteristics.  I want the four groups to all have similar distributions along a certain metric (i.e., cost) -- so the mean, median, SD, etc., are similar, so I want to sample observations from each group.  I'll choose one of the four groups as my baseline (probably the one with smallest range or the fewest number of observations - but I'm open to any suggestions about that as well).  

What's the best approach for doing this?  I suspect this question has been addressed numerous times in various places, so being pointed in the right direction is sufficient.  Note: we still have Stata 9.2, so nothing too fancy.

Thank you!

Kate

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