On Thu, 6 Oct 2005, Pyy-Martikainen Marjo wrote:
> I specify a model with strata by covariate interactions. I would like to
> conduct a Wald test
> for the null hypothesis "no differences between any covariate effects in the 3
> groups".
The "survey" package has a function regTermTest (which isn't specific to
survey models -- it works on anything with vcov() and coef() methods).
-thomas
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