UNSPECIFIED (2005) Bradley-Terry models in R. JOURNAL OF STATISTICAL SOFTWARE, 12 (1). pp. 1-12. ISSN 1548-7660

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Abstract

This paper describes the R add-on package BradleyTerry, which facilitates the specification and fitting of Bradley-Terry logit models to pair-comparison data. Included are the standard 'unstructured' Bradley-Terry model, structured versions in which the parameters are related through a linear predictor to explanatory variables, and the possibility of an order or 'home advantage' effect. Model fitting is either by maximum likelihood or by bias-reduced maximum likelihood in which the first-order asymptotic bias of parameter estimates is eliminated. Also provided are a simple and efficient approach to handling missing covariate data, and suitably-defined residuals for diagnostic checking of the linear predictor; these are new methodological contributions which will be discussed in greater detail elsewhere.

Item Type:	Journal Article
Subjects:	Q Science > QA Mathematics > QA76 Electronic computers. Computer science. Computer software Q Science > QA Mathematics
Journal or Publication Title:	JOURNAL OF STATISTICAL SOFTWARE
Publisher:	JOURNAL OF STATISTICAL SOFTWARE
ISSN:	1548-7660
Date:	January 2005
Volume:	12
Number:	1
Number of Pages:	12
Page Range:	pp. 1-12
Publication Status:	Published
URI:	http://wrap.warwick.ac.uk/id/eprint/34441

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