Over the last twenty years or so the Dynamic Volatility literature has produced a wealth of univariateand multivariate GARCH type models. While the univariate models have been relativelysuccessful in empirical studies, they suffer from a number ofweaknesses, such as unverifiable...

The unit root revolution in time series modeling has created substantial interest in non-stationarity and its implications for empirical modeling. Beyond the original interest in trend vs.di¤erence non-stationarity, there has been renewed interest in testing and modeling structuralbreaks. The...