random effects

["Frank Lawrence" <Cougar@psu.edu>]

When using lme to test if random effects are zero, I have used the anova
function to compare two models; one representing the null hypothesis the
other representing the alternative.  I would like to know if use of anova is
appropriate in these circumstances because I understand that the null
hypothesis places the parameter of interest on the boundary of the parameter
space.

Respectfully,

Frank R. Lawrence