Date:         Wed, 20 Nov 2002 09:31:14 +1100
Reply-To:     rangarajan <b.rangarajan@pgrad.unimelb.edu.au>
Sender:       "SPSSX(r) Discussion" <SPSSX-L@LISTSERV.UGA.EDU>
From:         rangarajan <b.rangarajan@pgrad.unimelb.edu.au>
Subject:      square age
Content-Type: text/plain; charset="us-ascii"

Hi:
I would like to know what is the advantage of squaring a particular
variable especially variable like age. my understanding is that
when one is using longitudinal data sets, the same individual is followed
over a period of time and in order to keep the individual's age as
constant, we may square that variable. what would be the difference in
outcome in regression equation when one uses the variable age as it is and
in situations in, where it is squared. any references/input would be highly
appreciated
thanks in advance
rangarajan