You, Jinhong; Zhou, Haibo - In: Statistics & Probability Letters 77 (2007) 17, pp. 1666-1675
Nonparametric smoothings are useful tool to model longitudinal data. In this paper we study the estimating problem of longitudinal nonparametric additive regression models. A two-stage efficient approach is developed to estimate the unknown additive components. We show the resulted estimators...