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Re: st: Statistical Matching
From
[email protected]
To
[email protected]
Subject
Re: st: Statistical Matching
Date
Wed, 20 Jul 2011 08:10:14 -0700 (PDT)
Hi,
You may want to check mahapick:
ssc desc mahapick
Within it, the mahapick or mahascores programs may be particularly useful.
I don't know how it compares to nnmatch.
HTH,
--David
----- Original Message ----
From: "Gillette, Ryan (Volunteer)" <[email protected]>
Sent: Tue, July 19, 2011 12:26:13 PM
Hello,
I am trying to match comparable observations between two large datasets (300,000
to 3 million observations, depending which ones I decide to use). I am not
trying to calculate a treatment effect, but rather identify the id number or
observation number of an observation's closest match. I am matching across a few
variables, some of which I want to weight more than others in terms of required
precision. I don't think I will be able to use a propensity score, as it doesn't
seem appropriate for my task.
Does anyone know a program in Stata that can do these things? I have used
-nnmatch- before, but with such a large dataset I worry it could take days to
process. Is there a way to speed it up? Any ideas would be much appreciated!
Thanks,
Ryan
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