A Bayesian semiparametric accelerated failure time model.
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abstract
A Bayesian semiparametric approach is described for an accelerated failure time model. The error distribution is assigned a Plya tree prior and the regression parameters a noninformative hierarchical prior. Two cases are considered: the first assumes error terms are exchangeable; the second assumes that error terms are partially exchangeable. A Markov chain Monte Carlo algorithm is described to obtain a predictive distribution for a future observation given both uncensored and censored data.