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st: Average value for a certain range
Hi learned stata users,
I have a panel data which contains suppose, 50 countries gdp from year 1950 to 2000. Now for each country I would like to create a variable which measures the avergae gdp for a certain range of year, say from 1963 to 1980.I have gone through the manuals and archives without any clue.
Any help would be greatly appreciated.
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