UNA ESTRATEGIA EN DOS DIRECCIONES PARA LA SELECCIÓN DE MODELOS DE REGRESIÓN PARA EL CASO DE UNA VARIABLE EXPLICATIVA CUALITATIVA
Keywords:
Models Choice, qualitative variables, least square estimation, mean squared error and mean squared error of predictionAbstract
Statisticians continue trying to model real phenomenon. Linear models are a powerful tool even when the true unknown model
is non linear, because they bring us good approximations. We propose a model selection strategy sensible to apply in situation
where we have a unique regressor which is a qualitative one. The strategy seems to be a modification of one proposed by
Castells (1999) (see also Bunke y Castells, 1999). A validation in terms of simulated data is presented.
Palabras claves: selección de modelos, variables cualitativas, estimación mínimo cuadrática, cuadrado medio del error y
cuadrado medio del error de predicción.


