Read full paper at: http://www.scirp.org/journal/PaperInformation.aspx?PaperID=52710#.VKH8NcCAM4 Author(s) Jian Wu , Liugen Xue Affiliation(s) 1 College of Applied Sciences, Beijing University of Technology, Beijing, China . 2 College of Science, Northeastern University, Shenyang, China . ABSTRACT In this paper, we consider the problem of variable selection and model detection in additive models with longitudinal data. Our approach is based on spline approximation for the components aided by two Smoothly Clipped Absolute Deviation (SCAD) penalty terms. It can perform model selection (finding both zero and linear components) and estimation simultaneously. With appropriate selection of the tuning parame...
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