Portmanteau tests based on quadratic forms in the autocorrelations

Roberto Baragona, Francesco Battaglia and Domenico Cucina

Communications in Statistics - Theory and Methods, 2018, vol. 47, issue 17, 4355-4374

Abstract: Many white noise and goodness-of-fit tests are (asymptotically) written as quadratic forms in the ordinary autocorrelation estimates. The properties of such tests are studied by investigating the structure of the matrix of the quadratic form. We suggest to choose the matrix of the quadratic form in such a way that the power is maximized according to the information available about the alternative hypothesis. A simulation study sheds some light on the behavior of the test in finite samples. It is generally found more powerful than the most popular portmanteau tests, i.e., the Box and Pierce and the Ljung and Box tests.

Date: 2018
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DOI: 10.1080/03610926.2017.1380829

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