-findit count unique- points to the following FAQ: How do I compute the
number of distinct observations? Do you have an additional requirement
that's not covered in the FAQ?
..Frank
-----Original Message-----
From: [email protected]
[mailto:[email protected]] On Behalf Of Kang, Eugene
Sent: Tuesday, September 07, 2004 6:48 PM
To: '[email protected]'
Subject: st: counting unique ids
Hi,
I have a cross-section panel data that is unbalanced. For instance:
id year x1
111 1999 3
111 2000 5
111 2001 6
123 2000 4
123 2001 2
For the above example, there are 2 unique ids (111 and 123). Since my
dataset has over 6000 observations, what commands should I use to
generate a
count of unique ids?
Any help would be appreciated. Thanks!
SoonLee
*
* For searches and help try:
* http://www.stata.com/support/faqs/res/findit.html
* http://www.stata.com/support/statalist/faq
* http://www.ats.ucla.edu/stat/stata/
*
* For searches and help try:
* http://www.stata.com/support/faqs/res/findit.html
* http://www.stata.com/support/statalist/faq
* http://www.ats.ucla.edu/stat/stata/
