Bookmark and Share

Notice: On March 31, it was announced that Statalist is moving from an email list to a forum. The old list will shut down at the end of May, and its replacement, statalist.org is already up and running.


[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: st: Propensity Score Matching - Show matches


From   daniel klein <klein.daniel.81@googlemail.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: Propensity Score Matching - Show matches
Date   Wed, 2 Nov 2011 11:28:07 +0100

Maximilian,

please say where user-written commands come from. You are using
-pscore-, which is probably

package st0026 from http://www.stata-journal.com/software/sj2-4
---------------------------------------------------------------------------------------------

TITLE
      SJ2-4 st0026.  Estimation of averate treatment effects ...


and its latest update


package st0026_2 from http://www.stata-journal.com/software/sj5-3
---------------------------------------------------------------------------------------------

TITLE
      SJ5-3 st0026_2.  Estimation of average treatment effects

DESCRIPTION/AUTHOR(S)
      Estimation of average treatment effects
      by Sascha O. Becker, University of Munich
         Andrea Ichino, EUI
      Support:  so.b@gmx.net, andrea.ichino@iue.it
      After installation, type help attk, attnd, attnw,
       attr, atts, and pscore

As far as I can see, your options are given in the help files. For
example the first sentence in the help file for -pscore- states that

"pscore [...] stratifies individuals in blocks according to the
pscore; displays summary statistics [...] of the stratification;"

So I would start with options -detail- and -blockid-. Also, in the
help file for -attnw- (or -attnd-) (both links are in the help file
for -pscore-) you find other options ( -match_options-  -matchvar-,
-matchdta-, and -id-) that might be helpfull.

I was not able to get exaclty what you want (in a 5 min trial).
However, I am wondering just why you would like to see a list of the
nearest neighbors anyway?

I know it is (or was, or has been) disapproved to make suggestions on
alternative user-written commands, but of you do not intend to stick
to -pscore-, you might want to try -psmatch2- (available from SSC). In
the help-file you will find, that variable "_nk" is created.

"_nk In the case of one-to-one and nearest-neighbors matching, for
every treatment observation, it stores the observation number of the
k-th matched control observation."

Best
Daniel

-- 
Dear all,
I am doing Propensity Score Matching with pscore and I would like to
know if there is a way that Stata can give me a table (or put it in a
variable with IDs or something similar) that shows the matches, so for
example it shows the treated object on the left and the 5 nearest
neighbors (of the control group) on the right? Or is there any other
way of assigning the 5/10/... nearest neighbors of the control group
to each treated object?
Thanks, Maximilian
*
*   For searches and help try:
*   http://www.stata.com/help.cgi?search
*   http://www.stata.com/support/statalist/faq
*   http://www.ats.ucla.edu/stat/stata/


© Copyright 1996–2014 StataCorp LP   |   Terms of use   |   Privacy   |   Contact us   |   Site index