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A graphical tool for assessing the suitability of a count regression model.

Wilson, Paul and Einbeck, Jochen (2021) 'A graphical tool for assessing the suitability of a count regression model.', Austrian journal of statistics., 50 (1).


Whilst many numeric methods, such as AIC and deviance, exist for assessing or comparing model fit, diagrammatic methods are few. We present here a diagnostic plot, which we refer to as a `Quantile Band plot', that may be used to visually assess the suitability of a given count data model. In the case of diagnosed model inadequacy, the plot has the unique feature of conveying precise information on the character of the violation, hence pointing the data analyst towards a potentially better model choice.

Item Type:Article
Full text:Publisher-imposed embargo
(AM) Accepted Manuscript
Available under License - Creative Commons Attribution.
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Full text:(VoR) Version of Record
Available under License - Creative Commons Attribution 4.0.
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Publisher statement:The Austrian Journal of Statistics publish open access articles under the terms of the Creative Commons Attribution (CC BY) License.
Date accepted:01 April 2019
Date deposited:06 August 2019
Date of first online publication:24 November 2020
Date first made open access:20 January 2021

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