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Bayesian density estimation and inference using mixtures. (English) Zbl 0826.62021
Summary: We describe and illustrate Bayesian inference in models for density estimation using mixtures of Dirichlet processes. These models provide natural settings for density estimation and are exemplified by special cases where data are modeled as a sample from mixtures of normal distributions. Efficient simulation methods are used to approximate various prior, posterior, and predictive distributions. This allows for direct inference on a variety of practical issues, including problems of local versus global smoothing, uncertainty about density estimates, assessment of modality, and the inference on the numbers of components. Also, convergence results are established for a general class of normal mixture models.

MSC:
62F15Bayesian inference
65C99Probabilistic methods, simulation and stochastic differential equations (numerical analysis)
62G07Density estimation