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st: Correlating a variable against itself over two time moments


From   Martin Pszczola <martinpsz@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   st: Correlating a variable against itself over two time moments
Date   Fri, 6 Aug 2010 09:29:38 -0500

Hi;

    I have a data set that has 51 Likert Scale variables and a dummy variable for pretest/posttest. I am trying to obtain a correlation matrix in Stata for the correlations of the variables against themselves over the two time moments. For example, say I have variable P1. I want to correlate P1 from the pretest against P1 from the posttest. If anyone could provide advice on how to go about doing this in STATA, I would appreciate it. M
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