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st: Newbie question on creating variable


From   "Kakatua Kutta" <ambush@earthling.net>
To   statalist@hsphsun2.harvard.edu
Subject   st: Newbie question on creating variable
Date   Mon, 01 Mar 2004 14:14:46 -0500

countrycode           year             gdp
BAN                   1960             65
BAN                   1965             75
BAN                   1970             85
CAN                   1960             25
CAN                   1965             35
CAN                   1970             45

Dear Stata users,
Lets say I have the above data set. I want  to create a variable which measures the difference between the gdp in year 1970 and gdp in 1965 for each country. That is if "diff" is the new variable it would be diff = gdp(1970)-gdp (1965) for each country.
I am a new user and already spent hours on this. I would much appreciate your help.
Thanks in advance
AmBush
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