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ftb
2010 Apr 02
2
panel data
Hello, I have an unbalanced panel data set that looks like:
ID,YEAR,HEIGHT
Tom,2007,65
Tom,2008,66
Mary,2007,45
Mary,2008,50
Harry,2007,62
Harry,2008,62
James,2007,68
Jack,2007,70
Jordan,2008,72
That is, James, Jack, and Jordan are missing a YEAR.
Is there any command that will "fill in" the missing YEAR such that the end
result will be balanced and look like:
ID,YEAR,HEIGHT