clusterPower            clusterPower: doing various power analysis
                        calculations for cluster randomized trials.
crtpwr.2mean            Power calculations for simple cluster
                        randomized trials, continuous outcome
crtpwr.2prop            Power calculations for simple cluster
                        randomized trials, binary outcome
crtpwr.2rate            Power calculations for simple cluster
                        randomized trials, count outcome
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.
