Dear allstaters,
I'm sorry to ask about such a technical question, but I have many difficulties to find information about generalized linear models using GEE on the web and libraries are closed at the moment because of the massive strikes that are taking place at the moment in France.
I'd like to compare two generalized linear models with grouping structure using GEE, when the two models differ in the modelling structure of the working correlation matrix. For example, I'd like to compare the model where the correlation matrix of an individual (on which exist several observations) is of unstructured type, with the model where the correlation matrix would be of exchangeable type. Could anyone indicate me the test that should be used? I'm using SAS version 8.
Thanks a lot for your time,
Eve CORDA
Office national de la chasse et de la faune sauvage
(http://www.oncfs.gouv.fr)
BP 20
78612 Le Perray en Yvelines Cedex
FRANCE
Phone: +33 (0)1 30 46 60 64
Fax: +33 (0)1 30 46 60 99
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