A Command for Fitting Mixture Regression Models for Bounded Dependent Variables Using the Beta Distribution. (March 2018)

• Record Type: Journal Article
• Authors: Gray, Laura A.; Alava, Mónica Hernández
• Is Part Of: Stata journal. Volume 18:Number 1(2018)
• Page Start: 51
• Page End: 75
• Publication Date: 2018-03
• Subjects: st0513 -- betamix -- truncated inflated beta mixture -- beta regression -- mixture model -- cross-sectional data -- mapping; Statistics -- Periodicals; Statistics -- Computer programs -- Periodicals; 001.422
• DOI: 10.1177/1536867X1801800105
• Languages: English
• ISSNs: 1536-867X

Abstract

In this article, we describe thebetamix command, which fits mixture regression models for dependent variables bounded in an interval. The model is a generalization of the truncated inflated beta regression model introduced in Pereira, Botter, and Sandoval (2012, Communications in Statistics—Theory and Methods 41: 907–919) and the mixture beta regression model in Verkuilen and Smithson (2012, Journal of Educational and Behavioral Statistics 37: 82–113) for variables with truncated supports at either the top or the bottom of the distribution.betamix accepts dependent variables defined in any range that are then transformed to the interval (0, 1) before estimation.