2012
DOI: 10.1515/1559-0410.1471
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The Sensitivity of College Football Rankings to Several Modeling Choices

Abstract: Abstract. This paper proposes a multiple-membership generalized linear mixed model for ranking college football teams using only their win/loss records. The model results in an intractable, high-dimensional integral due to the random effects structure and nonlinear link function. We use recent data sets to explore the effect of the choice of integral approximation and other modeling assumptions on the rankings. Varying the modeling assumptions sometimes leads to changes in the team rankings that could affect b… Show more

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Cited by 5 publications
(9 citation statements)
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“…We consider sports for which ties are necessarily settled in overtime. Typically, teams are ranked using either the scores or the win-loss records (Karl, 2012); the multiresponse model (1) allows rankings to be done using both. Annis and Craig (2005) consider a similar approach for ranking college football teams.…”
Section: Example: Poisson and Binarymentioning
confidence: 99%
“…We consider sports for which ties are necessarily settled in overtime. Typically, teams are ranked using either the scores or the win-loss records (Karl, 2012); the multiresponse model (1) allows rankings to be done using both. Annis and Craig (2005) consider a similar approach for ranking college football teams.…”
Section: Example: Poisson and Binarymentioning
confidence: 99%
“…Although the RealVAMS model may be used in a variety of contexts in which multimembership data occur (Karl, 2012), we choose to present it within an educational context. In this context, the model is generally referred to as a multidimensional value-added model (VAM).…”
Section: Application Of the Realvams Packagementioning
confidence: 99%
“…The offense and defense ratings for each team are calculated while controlling for the quality of opponent, implicitly considering strength of schedule as in Harville (1977), Annis and Craig (2005), and Karl (2012). By contrast, raw offensive and defensive totals inflate the ranking of teams that play a set of easy opponents and penalize those that play a difficult schedule.…”
Section: The Modelmentioning
confidence: 99%
“…Traditionally, algorithms for ranking sports teams and predicting sporting outcomes utilize either the observed margin of victory (MOV) (Henderson, 1975) or the binary win/loss information (Mease, 2003, Karl, 2012, along with potential covariates such as game location (home, away, neutral). In contrast, we jointly model either MOV or win/loss along with a separate game-level response, which is shown to improve predictions under certain model specifications.…”
Section: Introductionmentioning
confidence: 99%
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