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st: how to choose between geographical identifiers??

From   "Ada Ma" <>
Subject   st: how to choose between geographical identifiers??
Date   Wed, 8 Mar 2006 23:16:40 +0000

Hi Statalist,

I have a bunch of wage observations and all the observations are
attached with two geographical identifiers - local authority districts
(LADs) and travel to work areas (TTWAs).  I want to find out how wages
vary across different areas in UK.

Now I can run wage estimations using either one of the two categorical
variables as explanatory variable.  I would however like to find out
which categorical variable fits the data better.  How do I compare the
two sets of results given that the explanatory variables are quite

Could you recommend what kind of tests I should use and if you are a
geographer, could you tell me are there any criteria that are used by
geographers to choose between different definitions of geographies
(regions, as opposed to LADs, as opposed to TTWAs, etc.)

Many thanks in advance!!


Ada Ma
Research Fellow
Health Economics Research Unit
University of Aberdeen, UK.
Tel: +44 (0) 1224 553863
Fax: +44 (0) 1224 550926

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