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st: tabulation after xtlogit


From   Christopher Sanford <sanf81@yahoo.com>
To   "statalist@hsphsun2.harvard.edu" <statalist@hsphsun2.harvard.edu>
Subject   st: tabulation after xtlogit
Date   Wed, 3 Aug 2011 13:33:58 -0700 (PDT)

I ran the xtlogit command and the results indicated there were 334 
observations and 184 groups. Within the dataset there are three 
categories of students and I need to know the number of unique students 
in each group included in the analysis.

For example, there are 
116 students with LD who have observations included in the analysis; 
however since the data is longitudinal a student may have more than 1 
observation. How do I determine the unique number of students with LD 
included in the analysis?

Thank you,

Christopher Sanford
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