Nonlinear time series with long memory:
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Peter M. Robinson; Paolo Zaffaroni
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Article
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1998
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Elsevier Science
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English
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We introduce a nonlinear model of stochastic volatility within the class of "product type" models. It allows different degrees of dependence for the "raw" series and for the "squared" series, for instance implying weak dependence in the former and long memory in the latter. We discuss its main stati