At 05:53 AM 5/28/2009, Nick Cox wrote:
It even took me some years to realise that panel and longitudinal meant
the same thing, really (unless that's wrong too in some sense or other).
Not everyone would agree with that. Sometimes successive
cross-sections (e.g. national polls of different samples taken at
different points in time but with the same questions) are referred to
as longitudinal data. A retrospective history, in which people are
asked detailed questions about the past, can be considered another
type of longitudinal data. I would say that a panel study is a
specific type of longitudinal study, but it isn't the only one.
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Richard Williams, Notre Dame Dept of Sociology
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