AchievementAwardsRCT    Achievement Awards Demonstration program
MortalityRates          State-level annual mortality rates by cause
                        among 18-20 year-olds
Wald_test               Test parameter constraints in a fitted linear
                        regression model
coef_test               Test all regression coefficients in a fitted
                        model
dropoutPrevention       Dropout prevention/intervention program effects
vcovCR                  Cluster-robust variance-covariance matrix
vcovCR.gls              Cluster-robust variance-covariance matrix for a
                        gls object.
vcovCR.ivreg            Cluster-robust variance-covariance matrix for
                        an ivreg object.
vcovCR.lm               Cluster-robust variance-covariance matrix for
                        an lm object.
vcovCR.lme              Cluster-robust variance-covariance matrix for
                        an lme object.
vcovCR.plm              Cluster-robust variance-covariance matrix for a
                        plm object.
vcovCR.rma.mv           Cluster-robust variance-covariance matrix for a
                        robu object.
vcovCR.rma.uni          Cluster-robust variance-covariance matrix for a
                        rma.uni object.
vcovCR.robu             Cluster-robust variance-covariance matrix for a
                        robu object.
