Observation-driven filtering of time-varying parameters using moment conditions
利用矩条件对时变参数进行观测驱动滤波AI 解读 ↓
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AI 根据所提供的论文材料归类:摘要围绕时变参数的递归观测驱动动态与滤波展开,直接对应时间序列方法。
利用矩条件对时变参数进行观测驱动滤波AI 解读 ↓
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We develop a new and flexible semi-parametric approach for time-varying parameter models when the true dynamics are unknown. The time-varying parameters are estimated using a recursive updating scheme that is driven by the influence function of a conditional moments-based criterion. We show that the updates ensure local improvements of the conditional criterion function in expectation. The dynamics are observation driven, which yields a computationally efficient methodology that does not require advanced simulation techniques for estimation. We illustrate the new approach using both simulated and real empirical data and derive new, robust filters for time-varying scales based on characteristic functions.
时间序列的在线广义矩估计
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The empirical likelihood inference is extended to a class of semiparametric models for stationary, weakly dependent series. A partially linear single-index regression is used for the conditional mean of the series given its past, and the present and past values of a vector of covariates. A parametric model for the conditional variance of the series is added to capture further nonlinear effects. We propose suitable moment equations which characterize the mean and variance…