A Vector Autoregressive Moving Average Model for Interval-Valued Time Series Data
A Vector Autoregressive Moving Average Model for Interval-Valued Time Series Data
复制标题
区间值时间序列数据的向量自回归移动平均模型
DOI:
10.1108/s0731-905320160000036021
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发表时间:
2016-06
期刊:
影响因子:
--
通讯作者:
Xin Yun
中科院分区:
文献类型:
--
作者:
Ai Han;Yongmiao Hong;Shouyang Wang;Xin Yun
Abstract Modelling and forecasting interval-valued time series (ITS) have received increasing attention in statistics and econometrics. An interval-valued observation contains more information than a point-valued observation in the same time period. The previous literature has mainly considered modelling and forecasting a univariate ITS. However, few works attempt to model a vector process of ITS. In this paper, we propose an interval-valued vector autoregressive moving average (IVARMA) model to capture the cross-dependence dynamics within an ITS vector system. A minimum-distance estimation method is developed to estimate the parameters of an IVARMA model, and consistency, asymptotic normality and asymptotic efficiency of the proposed estimator are established. A two-stage minimum-distance estimator is shown to be asymptotically most efficient among the class of minimum-distance estimators. Simulation studies show that the two-stage estimator indeed outperforms other minimum-distance estimators for various data-generating processes considered.
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