Nonparametric Modelling of Longitudinal Data: A Varying Coefficients Model
- Susan Orbe-Mandaluniz 2
- Vicente Núñez-Antón 2
- Juan M. Rodríguez-Póo 1
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1
Universidad de Zaragoza
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2
Universidad del País Vasco/Euskal Herriko Unibertsitatea
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Universidad del País Vasco/Euskal Herriko Unibertsitatea
Lejona, España
Editorial: Firenze University Press
ISBN: 88-8453-193-4
Año de publicación: 2004
Páginas: 234-238
Tipo: Aportación congreso
Resumen
We propose a very flexible and general semiparametric model that allows for time-varying coefficients and/or covariate-varying (including groupsvarying or subjects-varying) coefficients in a longitudinal data setting. Tests for model specification are proposed and, thus, this proposal allows to discriminate between the different sources of variation for the regression coefficients. The model is applied to several longitudinal data examples and, in addition, its performance is studied when compared to other more restricted proposals.