Doornik, Jurgen; Ooms, Marius - Department of Economics, Oxford University - 2003
Several aspects of GARCH(p, q) models that are relevant for empirical applications are investigated. In particular, it … is noted that the inclusion of dummy variables as regressors can lead to multimodality in the GARCH likelihood. This … invalidates standard inference on the estimated coefficients. Next, the implementation of different restrictions on the GARCH …