st: Adding variable from baseline file into cohort based file

[Ziad El-Khatib <Ziad.El-Khatib@ki.se>]

Dear STATA lister, it might be very simple question:
 Any tips how I can add a variable, called 'educ' from a baseline file
 'baseline' into follow-up file (cohort based, where patients have
been  followed over 12 months time)?

Thank you in advance and best regards
ziad

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