Description: Specify and fit the Bradley-Terry model and structured versions

Packaged: Thu May 27 09:52:46 2004; david

Packaged: Tue May 25 09:37:43 2004; david

Packaged: Sun Jan  9 21:39:58 2005; hornik

Packaged: Sun Mar 20 14:03:55 2005; david

Packaged: Thu Aug  4 11:32:33 2005; david

Packaged: Thu Jul 10 22:40:38 2008; david

Title: Bradley-Terry Models -- this package is now deprecated in favour
Description: Specify and fit the Bradley-Terry model and structured

Imports: MASS, nlme, brglm, gtools, lme4

Imports: brglm, gnm, gtools, lme4, stats

Description: Specify and fit the Bradley-Terry model, including structured versions in which the parameters are related to explanatory variables through a linear predictor and versions with contest-specific effects, such as a home advantage.

Imports: brglm, gtools, lme4 (>= 1.0), qvcalc, stats

Authors@R: c(person("Heather", "Turner", role = c("aut", "cre"),

Title: Fits the Bradley-Terry Model to Potentially Large and Sparse
person("Ella", "Kaye", email = "E.Kaye.1@warwick.ac.uk", role = c("aut", "cre")),
person("David", "Firth", role = c("aut")))
Author: Ella Kaye [aut, cre], David Firth [aut]
Description: Facilities are provided for fitting the simple, unstructured Bradley-Terry model to networks of binary comparisons. The implemented methods are designed to scale well to large, potentially sparse, networks. A fairly high degree of scalability is achieved through the use of EM and MM algorithms, which are relatively undemanding in terms of memory usage (relative to some other commonly used methods such as iterative weighted least squares, for example). Both maximum likelihood and Bayesian MAP estimation methods are implemented. The package provides various standard methods for a newly defined 'btfit' model class, such as the extraction and summarisation of model parameters and the simulation of new datasets from a fitted model. Tools are also provided for reshaping data into the newly defined "btdata" class, and for analysing the comparison network, prior to fitting the Bradley-Terry model. This package complements, rather than replaces, the existing 'BradleyTerry2' package. (BradleyTerry2 has rather different aims, which are mainly the specification and fitting of "structured" Bradley-Terry models in which the strength parameters depend on covariates.)
Imports: igraph, Matrix, Rcpp (>= 0.12.7), methods, purrr, dplyr
Suggests: Matrix.utils, stringr, knitr, rmarkdown, ggplot2