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The major aim of this empirical study is to estimate the volatility time series returns for a cluster of international … capture volatility clusters and changes in long and short term volatility impact. The econometric approch is based on randomly … using GARCH family models for estimating financial market volatility. Moreover, the sampled time interval includes two …
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We consider the problem of testing for an omitted multiplicative long-term component in GARCH-type models. Under the alternative, there is a two-component model with a short-term GARCH component that fluctuates around a smoothly time-varying long-term component which is driven by the dynamics of...
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