st: saving case ids when using "propensity score" matching

["Ben Hoen" <bhoen@lbl.gov>]

Hi all,

I have used a multivariate regression model (with a number of continuous,
fixed and interacted variables) to produce a predicted value of my dependent
variable, which I will use as a propensity score in a matching exercise.  

I want to loop through each "treated" case, and select a set of k-nearest
neighbors based on this (predicted value) "propensity score".  

Ideally I would be able to save the id of each matched control case so that
I could use that in an analysis I will do later.

Although there are a number of propensity score matching algorithms
available (e.g., psmatch2, pscore, nnmatch - all available via ssc) I have
not found one that allows me to save an indicator variable (e.g., unique id)
for the matches (moreover their respective weights, in the case of identical
matches).  Ideally I would have an output like geonear (available via ssc)
that allows me to save off an id for the k-nearest neighbors.  

Is what I am hoping for available?

Ben

Ben Hoen
Staff Research Associate 
Lawrence Berkeley National Laboratory
Office: 845-758-1896
Cell: 718-812-7589
bhoen@lbl.gov
http://emp.lbl.gov/staff/ben-hoen

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