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st: Pulling out observations based on a condition

From   Dmitriy Krichevskiy <>
To   statalist <>
Subject   st: Pulling out observations based on a condition
Date   Wed, 29 Jul 2009 09:28:32 -0400

Dear Statalisters,

I have a panel data set with about 14000 people and 21 time periods. I
wanted to pull out persons who have transitioned from one category of
the same dichotomous variable to another (say from lowest income
quintile to the highest) during one time increment - for the whole
duration on the sample. So, essentially, I need to pull out all the
people that did that transition from first period to second plus from
second to third and so on... I know it is a simple loop but whatever I
do Stata drops all of the observations. Perhaps, I should also mention
that I am new to programing altogether. Thanks for all of your help,
Statalisters definitely  will be thanked in my dissertation.
Dmitriy Krichevskiy
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