ows you to calculate marginal effects at representative cases (sometimes “MERs”) or marginal effects at means - or any other statistic - (sometimes “MEMs”), which are marginal effects for particularly interesting (sets of) observations in a dataset. This differs from marginal effects on subsets of the original data (see the next section for a demonstration of that) in that it operates on a modified set of the full dataset wherein particular variables have been replaced by specified values. This is h