This paper analyzes volatility spillovers in multivariate GARCH-type models. We show that the cross-effects between the conditional variances determine the persistence of the transmitted volatility innovations. In particular, the influence of a foreign volatility innovation on a conditional...

Because fourth-generation (4G) mobile communications services are provided over refarmed and heterogeneous bands for the first time, a unified spectrum management regime fails to accommodate the spectral heterogeneity. In Taiwan, we still extend the 2G incumbents’ usage right on the 900MHz and...