Carnero, M. Angeles; Peña, Daniel; Ruiz, Esther - Instituto Valenciano de Investigaciones Económicas (IVIE) - 2008
The main goal when fitting GARCH models to conditionally heteroscedastic time series is to estimate the underlying volatilities. It is well known that outliers affect the estimation of the GARCH parameters. However, little is known about their effects when estimating volatilities. In this paper,...