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Re: st: One to N matching

From   Richard Goldstein <>
Subject   Re: st: One to N matching
Date   Tue, 18 Nov 2008 11:07:52 -0500

for already existing programs, rather than writing your own, I would start with -vmatch- (user-written, type -findit vmatch-)

I'm not sure it will cover your last criterion (used only once) but if not it should be easy to eliminate those


Gao Liu wrote:
Dear Statlist:

I have a question about one to N matching.

I have a dataset containing three variables: id, score, case, where
case is a dummy variable indicating whether or not the observation is
in the case group. How can I match each case observation to N non-case
observation based on the score?  Each case observation matches to the
N non-case observations with the closest scores, but no case
observation can match the same observation (i.e. the non-case
observation can be used only one time).

Thank you


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