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The Added Variable Plot for a Time Series of Counts

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The issue of modelling non-Gaussian time series data is one that has been examined by several authors in recent years. Zeger (1988) introduced a parameter-driven model for a time series of counts as well as a more general observation-driven model for non-Gaussian data (Zeger & Qaqish, 1988). This paper examines the application of the added variable plot to these two models. This plot is useful for determining the strength of relationships and the detection of influential or outlying observations.
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Keywords: Added variable plots; count data; observation-driven models; parameter-driven models

Document Type: Research Article

Affiliations: Queensland University of Technology

Publication date: March 1, 1998

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