The basic structural time series model has been designed for the modelling and forecasting of seasonal economic time series. In this paper we explore a generalisation of the basic structural time series model in which the time-varying trigonometric terms associated with different seasonal...

In this paper, we make use of state space models to investigate the presence of stochastic trends in economic time series. A model is specified where such a trend can enter either in the autoregressive representation or in a separate state equation. Tests based on the former are analogous to...

Este documento presenta una aplicacion del metodo de Bell y Hillmer, basado en funciones de transferencia, para modelar las consecuencias de variaciones en los dias comerciales por mes, la influencia de la Semana Santa, y el empleo del analisis de observaciones atipicas, para detectar efectos...