2004 Volume 3 Pages 19-45
For the grouped growth data sampled individually with repeated measures, two types of growth curves can be simultaneously estimated by using a multivariate non-linear regression model with random effects. One is the average growth curve for the group, and the other is each individual growth curve within the group. With the use of forest stand growth data we elaborate methodological steps for estimating the average growth curve as well as an individual growth curve. A confidence interval of the average growth curve for the group is also determined. We apply a generalized non-linear mixed effects model to the analysis, which is one of multivariate non-linear regression models with random effects.
