Robust Bayesian Regression Analysis using Raamsay-Novick Distributed Errors with Student-t Prior
Yazarlar (3)
Dr. Öğr. Üyesi Mutlu ALTUNTAŞ Sinop Üniversitesi, Türkiye
Prof. Dr. Emel ÇANKAYA Sinop Üniversitesi, Türkiye
Olçay Arslan Ankara Üniversitesi, Türkiye
| Makale Türü |
Özgün Makale
(ESCI dergilerinde yayınlanan tam makale)
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| Dergi Adı | COMMUNICATIONS FACULTY OF SCIENCES UNIVERSITY OF ANKARA-SERIES A1 MATHEMATICS AND STATISTICS | ||
| Dergi ISSN | 1303-5991 | ||
| Dergi Tarandığı Indeksler | ESCI | ||
| Makale Dili | İngilizce | Basım Tarihi | 01-2019 |
| Cilt / Sayı / Sayfa | 68 / 1 / 602–618 | DOI | 10.31801/cfsuasmas.441096 |
| Makale Linki | https://dergipark.org.tr/tr/download/article-file/501854 | ||
| UAK Araştırma Alanları |
Uygulamalı İstatistik
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| Özet |
| This paper investigates bayesian treatment of regression modelling with Ramsay - Novick (RN) distribution specifically developed for robust inferential procedures. It falls into the category of the so-called heavy-tailed distributions generally accepted as outlier resistant densities. RN is obtained by coverting the usual form of a non-robust density to a robust likelihood through the modification of its unbounded influence function. The resulting distributional form is quite complicated which is the reason for its limited applications in bayesian analyses of real problems. With the help of innovative Markov Chain Monte Carlo (MCMC) methods and softwares currently available, here we first suggested a random number generator for RN distribution. Then, we developed a robust bayesian modelling with RN distributed errors and Student-t prior. The prior with heavy-tailed properties is here chosen to provide a built-in protection against the misspecification of conflicting expert knowledge (i.e. prior robustness). This is particularly useful to avoid accusations of too much subjective bias in the prior specification. A simulation study conducted for performance assessment and a real-data application on the famously known "stack loss" data demonstrated that robust bayesian estimates with RN likelihood and heavy-tailed prior are robust against outliers in all directions and inaccurately specified priors. |
| Anahtar Kelimeler |
| Robust bayesian regression | Ramsay-Novick | heavy-tailed distribution | Student-t prior | prior robustness |
BM Sürdürülebilir Kalkınma Amaçları
| Atıf Sayıları | |
| Web of Science | 1 |
| Google Scholar | 2 |