GRLOGIT: Stata module to plot logit of a variable by categories of another variable

grlogit plots the logit of one variable against categories of another variable. This may be of some use in the beginning of logistic regression modelling. You could use this program to confirm visually that there isn't a non-linear relationship of the logit of the dependent variable to the predictor variable. Thus, you could screen your explanatory variables during the univariate analysis stage.