Algebraic exact inference for rater agreement models

Fabio Rapallo ()
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Fabio Rapallo: University of Genova

Statistical Methods & Applications, 2005, vol. 14, issue 1, No 5, 45-66

Abstract: Abstract In recent years, a method for sampling from conditional distributions for categorical data has been presented by Diaconis and Sturmfels. Their algorithm is based on the algebraic theory of toric ideals which are used to create so called “Markov Bases”. The Diaconis-Sturmfels algorithm leads to a non-asymptotic Monte Carlo Markov Chain algorithm for exact inference on some classes of models, such as log-linear models. In this paper we apply the Diaconis-Sturmfels algorithm to a set of models arising from the rater agreement problem with special attention to the multi-rater case. The relevant Markov bases are explicitly computed and some results for simplify the computation are presented. An extended example on a real data set shows the wide applicability of this methodology.

Keywords: Cohen's kappa; Conditional inference; Diaconis-Sturmfels algorithm; Log-linear models (search for similar items in EconPapers)
Date: 2005
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Citations: View citations in EconPapers (3)

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DOI: 10.1007/BF02511574

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