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st: a stat question


From   "Data Analytics Corp." <dataanalytics@earthlink.net>
To   Stata Listserve <statalist@hsphsun2.harvard.edu>
Subject   st: a stat question
Date   Thu, 03 Jul 2008 21:42:31 -0400

Hi,

I have a client who has been conducting a survey for several years, each year being a "wave". This year, the whole survey was changed: most of the questionnaire, sample design and size, locations (prior waves had only four cities, the new one has 8 cities). I was asked about doing some significance testing on a few variables. I was very uneasy about this because everything about the surveys is different. I feel that any comparisons would be shaky because so much has changed. Stat theory doesn't seem to say anything about comparing across different waves such as this. Any thoughts on doing significance tests on waves of surveys where everything about the surveys have changed from one wave to the next? Any literature I can be pointed to? I've run into this before with other clients, so it's a common occurrence.

Thanks,

Walt

--
________________________

Walter R. Paczkowski, Ph.D.
Data Analytics Corp.
44 Hamilton Lane
Plainsboro, NJ 08536
________________________
(V) 609-936-8999
(F) 609-936-3733
dataanalytics@earthlink.net
www.dataanalyticscorp.com

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