Comparison before-and-after mean for each individual (t-test)

[Minchul Park]

Hi, I am a graduate student.

I have variables indicating a test score and retirement dummy.
I want pair the before-and-after-retirement scores for the same individuals and compare the means.
How to do this t-test?
Please, help me!

[Joseph Coveney]

You don't show anything, but if your dataset is "wide", then

ttest sco0 = sco1

and if it's "long, then

anova sco ret pid

where sco0 and sco1 are test scores, before and after; sco is test score, ret is retirement status and pid is individual.