Sun, Liuquan; Zhou, Xian - In: Statistics & Probability Letters 58 (2002) 3, pp. 309-317
In a longitudinal study, suppose that for each subject, repeated measurements of the response variable and covariates are collected at a set of distinct, irregularly spaced time points. In this paper, we consider a semiparametric model to analyse such panel data. The model specifies that the...