Summary
It is well known that outliers can strongly influence sample autocorrelations and hence the identification of time series models. The results of this article indicate that different types of outlier can have qualitatively different effects.
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Chan, WS. Understanding the effect of time series outliers on sample autocorrelations. Test 4, 179–186 (1995). https://doi.org/10.1007/BF02563108
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DOI: https://doi.org/10.1007/BF02563108