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The asymmetric moving average model (asMA) is extended to allow forasymmetric quadratic conditional heteroskedasticity (asQGARCH). Theasymmetric parametrization of the conditional variance encompassesthe quadratic GARCH model of Sentana (1995). We introduce a framework fortesting asymmetries in...
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, estimated shrinkage, and no nonlinearity. Then I entertain alternative specifications of the zero lower bound: replace the … interest rate expectations to deal with the nonlinearity in the policy rate. Since the policy rate will remain low for some …
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