In education research, normal regression models may not be appropriate due to the presence of boundedvariables, which may exhibit a large variety of distributional shapes and present floor and ceiling effects.In this article a class of quantile regression models for bounded response variables is developed. The one-parameter Aranda-Ordaz symmetric and asymmetric families of transformations are applied to addressmodelling issues that arise when estimating conditional quantiles of a bounded response variable whoserelationship with the covariates is possibly nonlinear. This approach exploits the equivariance property ofquantiles and aims at achieving linearity of the predictor. This offers a flexible model-based alternativeto nonparametric estimation of the quantile function. Since the transformation is quantile-specific, themodelling takes into account the local features of the conditional distribution of the response variable.Our study is motivated by the analysis of reading performance in seven-year old children part of theMillennium Cohort Study.

Aranda-Ordaz quantile regression for student performance assessment / Dehbi, H-M; Cortina-Borja, M; Geraci, M. - In: JOURNAL OF APPLIED STATISTICS. - ISSN 0266-4763. - 43:1(2016), pp. 58-71. [10.1080/02664763.2015.1025724]

Aranda-Ordaz quantile regression for student performance assessment

GERACI M
2016

Abstract

In education research, normal regression models may not be appropriate due to the presence of boundedvariables, which may exhibit a large variety of distributional shapes and present floor and ceiling effects.In this article a class of quantile regression models for bounded response variables is developed. The one-parameter Aranda-Ordaz symmetric and asymmetric families of transformations are applied to addressmodelling issues that arise when estimating conditional quantiles of a bounded response variable whoserelationship with the covariates is possibly nonlinear. This approach exploits the equivariance property ofquantiles and aims at achieving linearity of the predictor. This offers a flexible model-based alternativeto nonparametric estimation of the quantile function. Since the transformation is quantile-specific, themodelling takes into account the local features of the conditional distribution of the response variable.Our study is motivated by the analysis of reading performance in seven-year old children part of theMillennium Cohort Study.
2016
bounded variable; transformation; education; Millennium Cohort Study; marginal effec
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Aranda-Ordaz quantile regression for student performance assessment / Dehbi, H-M; Cortina-Borja, M; Geraci, M. - In: JOURNAL OF APPLIED STATISTICS. - ISSN 0266-4763. - 43:1(2016), pp. 58-71. [10.1080/02664763.2015.1025724]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1463952
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