Asymptotics of some estimators and sequential residual empiricals in nonlinear time series
非线性时间序列中若干估计量与序贯残差经验过程的渐近理论AI 解读 ↓
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非线性时间序列中若干估计量与序贯残差经验过程的渐近理论AI 解读 ↓
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This paper establishes the asymptotic uniform linearity of M- and R-scores in a family of nonlinear time series and regression models. It also gives an asymptotic expansion of the standardized sequential residual empirical process in these models. These results are, in turn, used to obtain the asymptotic normality of certain classes of M-, R- and minimum distance estimators of the underlying parameters. The classes of estimators considered include analogs of Hodges-Lehmann, Huber and LAD (least absolute deviation) estimators. Some applications to the change point and testing of the goodness-of-fit problems in threshold and amplitude-dependent exponential autoregression models are also given. The paper thus offers a unified functional approach to some aspects of robust inference for a large class of nonlinear time series models.