Journal
BIOMETRICS
Volume 70, Issue 1, Pages 73-83Publisher
WILEY
DOI: 10.1111/biom.12112
Keywords
Bayes factor; Genetic association; Linear models; Model comparison; Model selection
Funding
- NIH [HG007022]
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Motivated by examples from genetic association studies, this article considers the model selection problem in a general complex linear model system and in a Bayesian framework. We discuss formulating model selection problems and incorporating context-dependent a priori information through different levels of prior specifications. We also derive analytic Bayes factors and their approximations to facilitate model selection and discuss their theoretical and computational properties. We demonstrate our Bayesian approach based on an implemented Markov Chain Monte Carlo (MCMC) algorithm in simulations and a real data application of mapping tissue-specific eQTLs. Our novel results on Bayes factors provide a general framework to perform efficient model comparisons in complex linear model systems.
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