glmmPQL & Wald-type F-tests

["Fowler, Mark" <FowlerM@mar.dfo-mpo.gc.ca>]

Hello,
        Might anyone know how to conduct Wald-type F-tests of the fixed effects estimated by glmmPQL? I see this implemented in SAS (GLIMMIX), and have seen it recommended in user group discussions, but haven't come across any code to accomplish it. I understand the anova function treats a glmmPQL fit as an lme fit, with the test assumptions based on maximum likelihood, which is inappropriate for PQL. I'm using S-Plus 7. I also have R 2.7 and S-Plus 8 if necessary.

Mark Fowler
Population Ecology Division
Bedford Inst of Oceanography
Dept Fisheries & Oceans
Dartmouth NS Canada
B2Y 4A2
Tel. (902) 426-3529
Fax (902) 426-9710
Email fowlerm@mar.dfo-mpo.gc.ca
Home Tel. (902) 461-0708
Home Email mark.fowler@ns.sympatico.ca