Mathematics Colloquium



Department of Mathematics
University of Nebraska at Omaha


WHEN:
Thursday, March 6, 2008 at 2:30 PM

WHERE:
Durham Science Center, Room 115

WHAT:


Dr. Andrew W. Swift

University of Nebraska at Omaha


will give a talk on

Extensions to the Bradley-Terry Model for Paired Comparisons


ABSTRACT:
In 1952, Ralph Bradley and Milton Terry published a paper which offered a model for ranking objects using data from pairwise comparisons among the objects.  Over the past 50 years, this model has become the standard methodology for analyzing paired-comparison data. However, while one of the main benefits of this model is its simplicity, this is also one of its limitations. The simplistic nature of the model allows is only to be applied to a relatively small number of situations, for example, each of the pairwise comparisons needs to result in an outright preference, ties are not allowed.   

The purpose of this talk is to give a brief introduction to the Bradley-Terry model, then to discuss ways to extend the model so that it may be applied to situations in which the original model is not applicable. Examples of the use of these extended models will also be presented.



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