[DDI-CDG] Re: [DDI-SRG] Longitudinal data proposal

[Wendy Thomas]

Sanda, correct me if I'm wrong, but I believe the answer to I-Lin's
question is that in a longitudianal study the respondent can change over
time, particularly if the the sample is one of households where a
different person might respond from month to month or year to year.

Wendy


On Wed, 14 Sep 2005, I-Lin Kuo wrote:

> Hi Sanda,
>
> I have a question:
>
> "It will also be necessary to identify, for each variable, the
> respondent, analysis unit, universe, and certainly the physical data
> file containing the variable. "
>
> What's "the respondent"? I'm confused because the other things
> mentioned, "analysis unit", etc., are "variable-wide", so to speak,
> but my understanding of "the respondent" is that it pertains only to a
> single record, so wouldn't be a comparison criteria.
>
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Wendy L. Thomas                          Phone: +1 612.624.4389
Data Access Core Director		 Fax:   +1 612.626.8375
Minnesota Population Center              Email: wlt at pop.umn.edu
University of Minnesota
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225 19th Avenue South
Minneapolis, MN 55455