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Modelling the effect of subject‐specific covariates in paired comparison studies with an application to university rankings
Author(s) -
Dittrich R.,
Hatzinger R.,
Katzenbeisser W.
Publication year - 1998
Publication title -
journal of the royal statistical society: series c (applied statistics)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.205
H-Index - 72
eISSN - 1467-9876
pISSN - 0035-9254
DOI - 10.1111/1467-9876.00125
Subject(s) - subject (documents) , covariate , representation (politics) , preference , object (grammar) , computer science , econometrics , linear model , statistics , mathematics education , mathematics , psychology , artificial intelligence , library science , political science , politics , law
Preference decisions will usually depend on the characteristics of both the judges and the objects being judged. In the analysis of paired comparison data concerning European universities and students' characteristics, it is demonstrated how to incorporate subject‐specific information into Bradley–Terry‐type models. Using this information it is shown that preferences for universities and therefore university rankings are dramatically different for different groups of students. A log‐linear representation of a generalized Bradley–Terry model is specified which allows simultaneous modelling of subject‐ and object‐specific covariates and interactions between them. A further advantage of this approach is that standard software for fitting log‐linear models, such as GLIM, can be used.