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st: Looping in each of 5 imputed datasets

From   "Anna D. Johnson" <>
Subject   st: Looping in each of 5 imputed datasets
Date   Sat, 06 Feb 2010 11:25:19 -0500

I am using Stata 10 in Windows. I have multiply imputed data that I imputed using -ice-. I want to eventually be able to run the -psmatch2- and -pstest- commands in each of my 5 imputed data sets. I would like to tell Stata to run these commands, first in dataset _mj=1, then in dataset _mj=2, and so on through dataset _mj=5. A colleague was kind enough to share some code with me, but I can't get it run. Specifically, after the -psmatch2- line, I get an "invalid syntax" message. Here is the code I have been trying to use:

gen weight1=.;
gen pscore1=.;
forvalues x=1/5{;
set seed 339487731;
gen r = uniform();
sort _mj r;
drop r;

psmatch2 treatment covars covars outcome if _mj==`x',
outcome(outcome) noreplacement desc common trim(10);

pstest covars covars outcome, sum ;
replace weight1=_weight if _mj==`x';
replace pscore1=_pscore if _mj==`x';

I imagine somewhere in there I need to specify that the 'x' represents each of the _mj datasets, but I don't know how to do this. Any help would be greatly appreciated.

Many thanks.

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