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Inference with three-level prior distributions in quantile regression problems

Rahim Alhamzawi ()

Journal of Applied Statistics, 2017, vol. 44, issue 11, 1947-1959

Abstract: In this paper, we propose a three level hierarchical Bayesian model for variable selection and estimation in quantile regression problems. Specifically, at the first level we consider a zero mean normal priors for the coefficients with unknown variance parameters. At the second level, we specify two different priors for the unknown variance parameters which introduce two different models producing different levels of sparsity. Then, at the third level we suggest joint improper priors for the unknown hyperparameters assuming they are independent. Simulations and Boston Housing data are utilized to compare the performance of our models with six existing models. The results indicate that our models perform good in the simulations and Boston Housing data.

Date: 2017
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DOI: 10.1080/02664763.2016.1238051

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