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st: Counting months over several years in a variable


From   George Chioran <george_chioran@yahoo.com>
To   statalist@hsphsun2.harvard.edu
Subject   st: Counting months over several years in a variable
Date   Sat, 29 May 2010 06:06:31 -0700 (PDT)

Dear statalisters, 
 
I want to count the
months in several years. I have variables year and month, and want to obtain
variable mvar. My database looks like this. 

Year       month  mvar
2008       8             1
2008       9             2
2008       10     3
2008       11           4
2008       12           5
2009       1             6
2009       2             7
2009       3             8
…             …             …
 
Thank you in advance
for your help, 
George


      

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