Parametric Bootstrap and Kenward Roger Based Methods for Mixed
Model Comparison
Ulrich Halekoh <uhalekoh@health.sdu.dk> Søren Højsgaard
    <sorenh@math.aau.dk>
Test in mixed effects models. Attention is on mixed effects models
    as implemented in the 'lme4' package. This package implements a parametric
    bootstrap test and a Kenward Roger modification of F-tests for linear mixed
    effects models and a parametric bootstrap test for generalized linear mixed
    models.
Matrix (>= 1.2.3), parallel, MASS, methods