Testing for independence between functional time series
函数型时间序列之间的独立性检验AI 解读 ↓
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AI 根据所提供的论文材料归类:摘要明确以两条函数型时间序列的独立性及弱时间依赖为对象,因此归入时间序列;金融应用证据不足。
函数型时间序列之间的独立性检验AI 解读 ↓
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Frequently econometricians are interested in verifying a relationship between two or more time series. Such analysis is typically carried out by causality and/or independence tests which have been well studied when the data is univariate or multivariate. Modern data though is increasingly of a high dimensional or functional nature for which finite dimensional methods are not suitable. In the present paper we develop methodology to check the assumption that data obtained from two functional time series are independent. Our procedure is based on the norms of empirical cross covariance operators and is asymptotically validated when the underlying populations are assumed to be in a class of weakly dependent random functions which include the functional ARMA, ARCH and GARCH processes.