TITLE:      Growth model for categorical outcomes

DATA:       File is Duncan_101.dat;

VARIABLE:   Names are Y1 Y2 Y3 Y4; 
        	Categorical are Y1-Y4;

ANALYSIS:   Estimator=MLR;

MODEL:     	i s | Y1@0 Y2@1 Y3@2 y4@3;

OUTPUT:     stdyx tech1 tech3 tech4 tech10;

PLOT:       Type is plot3;
            Series = Y1-Y4 (*);