Summary In empirical studies often the values of some variables for some observations are much larger or smaller than the values for the other observations in the sample. These extreme observations, or outliers, often have a large impact on the results of statistical analyses. Conclusions based...

At the last users' group meeting I presented a GI command for estimating effects using linear models. The command relied on a classification of variables according to their function in the linear model, and the user had to select, from a list, the particular regression command to be used (e.g....