add_sign                Add signs to variable names
boot_ci                 Bootstrap Confidence Intervals
boot_default            Bootstrap (default) Bootstrap function for the
                        non-parametric and the nearest neighbor methods
dev_moments             Moment deviation
kl_dist_cor             Kullback-Leibler Divergence
kl_dist_def             Kullback-Leibler Divergence
nn                      Nearest-neighbors method
nn_wgt                  Nearest-neighbors weights
non_parm                Non-parametric method
optint                  Optimal intervention
optint_by_group         Optimal intervention, by group
outcome_diff            Outcome difference
par_cor                 Partial Correlation
per_distance            Distance Between Distributions
perm_test               Permutation test Test the null hypothesis
                        P(X|I=0) = P(X|I=1), using permutation test.
plot.optint             Plot optint object
plot.optint_by_group    Plot optint object, by group
plot_change             Plot the change in the distribution of X
summary.optint          Summary for optint object
var_pos                 Variable Position
wgt_adjust              Weights adjustment
wtd_bin                 Weighted Bin
