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

Wilson, Paul; Einbeck, Jochen

doi:10.17713/ajs.v50i1.921

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

Wilson, Paul; Einbeck, Jochen

Authors

Paul Wilson

Professor Jochen Einbeck jochen.einbeck@durham.ac.uk
Professor

Abstract

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.

Citation

Wilson, P., & Einbeck, J. (2021). A graphical tool for assessing the suitability of a count regression model. Austrian Journal of Statistics, 50(1), 1-23. https://doi.org/10.17713/ajs.v50i1.921

Journal Article Type	Article
Acceptance Date	Apr 1, 2019
Online Publication Date	Nov 24, 2020
Publication Date	Jan 1, 2021
Deposit Date	Aug 6, 2019
Publicly Available Date	Jan 20, 2021
Journal	Austrian Journal of Statistics
Print ISSN	1026-597X
Publisher	Austrian Society for Statistics
Peer Reviewed	Peer Reviewed
Volume	50
Issue	1
Pages	1-23
DOI	https://doi.org/10.17713/ajs.v50i1.921
Publisher URL	https://ajs.or.at/index.php/ajs/article/view/921
Related Public URLs	https://wlv.openrepository.com/handle/2436/622632

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