expit                   The expit and logit functions.
fixed.effect            Canned estimation functions for the power
                        simulations.
hayes.power.poisson     An implementation of power calculations for
                        cluster-randomized study based on the
                        coefficient of variation.
mixed.eff.params        Calculation of variance in Poisson mixed model
                        setting.
power.sim.normal        Power simulations for cluster-randomized
                        crossover study designs.
