The paper considers the Markov-Switching GARCH(1,1)-model with time-varying transition probabilities. It derives sufficient conditions for the square of the process to display long memory and provides some additional intuition for the empirical observation that estimated GARCH-parameters often sum to almost one.
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Paper provided by CESifo GmbH in its series CESifo Working Paper Series with number
CESifo Working Paper No. 2225.
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