vcov arguments allow for custom variance-covariance matrices (like those you would have for "robust" standard errors).newdata to spare user from having to create such a placeholder column for the DV in their prediction grid.sim_qi() works as intended.{MASS} for {stevemisc} for the purpose of simulating a multivariate normal distribution. Fewer dependencies.logistf() in the {logistf} package.Initial development offering.