All,
I have a database of scores of subjects who were given the same memory test
on an annual basis. The data look something like:
SUBJECT YEAR 1 SCORE YEAR 2 SCORE YEAR 3 SCORE.....
Tom 15 16 14
Dick 12 13 10
Harry 15 14 15
.
.
.
I would like to determine if the subjects scores tend to increase or
decrease with time. I was thinking of using linear regression, with YEAR
as the x variable and SCORE as the y variable.
In order to do that, I think that I have to recode the data thusly:
SUBJECT YEAR SCORE
Tom 1 15
Tom 2 16
Tom 3 14
Dick 1 12
Dick 2 13
Dick 3 10
Harry 1 15
Harry 2 14
Harry 3 15
Does anyone know of a way to do this in Stata?
Thanks,
Jim Seward
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