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Activity Number: 446
Type: Contributed
Date/Time: Wednesday, August 6, 2008 : 2:00 PM to 3:50 PM
Sponsor: Section on Physical and Engineering Sciences
Abstract - #302029
Title: On Dirichlet Regression Residuals
Author(s): Rafiq Hijazi*+
Companies: United Arab Emirates University
Address: CBE, Department of Statistics, Al-Ain, , United Arab Emirates
Keywords: Compositional data ; Dirichlet regression ; Deviance residuals
Abstract:

Dirichlet regression, besides logratio regression, has been widely used in modeling compositional data. In this paper, several approaches to calculate residuals for Dirichlet regression are considered. The empirical distributions of the developed residuals are discussed and a Monte Carlo simulation study to evaluate their behavior is performed. Finally, an illustrative example with real data is presented and discussed.

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