Bayesian Generalized Kernel Models

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Zhihua Zhang, Guang Dai, Donghui Wang, Michael Jordan ;
Proceedings of the Thirteenth International Conference on Artificial Intelligence and Statistics, PMLR 9:972-979, 2010.

Abstract

We propose a fully Bayesian approach for generalized kernel models (GKMs), which are extensions of generalized linear models in the feature space induced by a reproducing kernel. We place a mixture of a point-mass distribution and Silverman’s g-prior on the regression vector of GKMs. This mixture prior allows a fraction of the regression vector to be zero. Thus, it serves for sparse modeling and Bayesian computation. For inference, we exploit data augmentation methodology to develop a Markov chain Monte Carlo (MCMC) algorithm in which the reversible jump method is used for model selection and a Bayesian model averaging method is used for posterior prediction.

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