Revista de Matemática: Teoría y Aplicaciones (Feb 2009)
Estrategia para la selección de modelos gráficos en tablas de contingencia no estructuradas
Abstract
Loglinear models are frequently utilized in the analysis of association patterns between variables in a multidimensional contingency table. Discrete graphical models are fashionable. They are a subset of the hierarchical loglinear models and its conditional independence structures are represented by a graph. Because of that they can be more easily interpreted. In this work four models selection methods are described and compared: stepwise selection (backward, forward and in two steps) and the EH procedure.A strategy for model selection is proposed. Keywords: graphical models, contingency tables, model selection methods