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首页> 外文期刊>Journal of statistical computation and simulation >Estimation and prediction of time-varying GARCH models through a state-space representation: a computational approach
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Estimation and prediction of time-varying GARCH models through a state-space representation: a computational approach

机译:通过状态空间表示估算和预测时变GARCH模型:一种计算方法

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摘要

We propose a state-space approach for GARCH models with time-varying parameters able to deal with non-stationarity that is usually observed in a wide variety of time series. The parameters of the non-stationary model are allowed to vary smoothly over time through non-negative deterministic functions. We implement the estimation of the time-varying parameters in the time domain through Kalman filter recursive equations, finding a state-space representation of a class of time-varying GARCH models. We provide prediction intervals for time-varying GARCH models and, additionally, we propose a simple methodology for handling missing values. Finally, the proposed methodology is applied to the Chilean Stock Market (IPSA) and to the American Standard&Poor's 500 index (S&P500).
机译:我们为GARCH模型提出了一种状态空间方法,该模型具有随时间变化的参数,能够处理通常在各种时间序列中观察到的非平稳性。通过非负确定性函数,可以使非平稳模型的参数随时间平滑变化。我们通过卡尔曼滤波器递推方程实现时域中时变参数的估计,找到一类时变GARCH模型的状态空间表示。我们为时变的GARCH模型提供了预测间隔,此外,我们提出了一种用于处理缺失值的简单方法。最后,所提出的方法适用于智利股票市场(IPSA)和美国标准普尔500指数(S&P500)。

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