asd                     Function to compute absolute standardized
                        difference of a variable between two groups
calipers                Matching priority function
eff.ratio               Inference for effect ratio
matches                 Function to find pair matches using a distance
                        matrix.  Called by 'opt.nearfar' to discover
                        optimal near-far matches.
nearfar-package         Near-Far Matching
opt.nearfar             Finds optimal near-far match
smahal                  Compute rank-based Mahalanobis distance matrix
                        between each pair
stat.lambda             Compute test statistic for effect ratio
summ.matches            Computes table of absolute standardized
                        differences
