Qu, Roger P.; Shao, Jun; Palta, Mari - In: Statistics & Probability Letters 55 (2001) 2, pp. 125-135
Estimation of the mean response in a longitudinal regression model can be based on a model which relates the response variable to a set of covariates. Often, for reasons of cost, time, and practicality, a larger set of covariates may be available at the model development stage than in later...