The term 'complex variation' refers to the existence of two or more random variables at the same level of the hierarchy. We include the variable time in this model to illustrate such a model. Click Finish to generate a revised input file. The output obtained for this model is given below. For this model 18 iterations were needed before convergence was reached.
All coefficients are highly significant.
When the two values of - 2 ln L are compared for these models, a decrease of 50.43 is noted. The addition of the coefficient for the variable time on level-1 of the model thus seems to lead to an improved fit compared to the linear growth model . Concluding remarks are given in the last section of this example. All rights reserved. See also SSI Internet site, conditions of use .