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Table of Contents

Preface Acknowledgements List of Contributors 1 The EM algorithm, variational approximations and expectation propagation for mixtures D.Michael Titterington 1.1 Preamble 1.2 The EM algorithm 1.3 Variational approximations 1.4 Expectation-propagation Acknowledgements References 2 Online expectation maximisation Olivier Cappe 2.1 Introduction 2.2 Model and assumptions 2.3 The EM algorithm and the limiting EM recursion 2.4 Online expectation maximisation 2.5 Discussion References 3 The limiting distribution of the EM test of the order of a finite mixture J. Chen and Pengfei Li 3.1 Introduction 3.2 The method and theory of the EM test 3.3 Proofs 3.4 Discussion References 4 Comparing Wald and likelihood regions applied to locally identifiable mixture models Daeyoung Kim and Bruce G. Lindsay 4.1 Introduction 4.2 Background on likelihood confidence regions 4.3 Background on simulation and visualisation of the likelihood regions 4.4 Comparison between the likelihood regions and the Wald regions 4.5 Application to a finite mixture model 4.6 Data analysis 4.7 Discussion References 5 Mixture of experts modelling with social science applications Isobel Claire Gormley and Thomas Brendan Murphy 5.1 Introduction 5.2 Motivating examples 5.3 Mixture models 5.4 Mixture of experts models 5.5 A Mixture of experts model for ranked preference data 5.6 A Mixture of experts latent position cluster model 5.7 Discussion Acknowledgements References 6 Modelling conditional densities using finite smooth mixtures Feng Li, Mattias Villani and Robert Kohn 6.1 Introduction 6.2 The model and prior 6.3 Inference methodology 6.4 Applications 6.5 Conclusions Acknowledgements Appendix: Implementation details for the gamma and log-normal models References 7 Nonparametric mixed membership modelling using the IBP compound Dirichlet process Sinead Williamson, Chong Wang, Katherine A. Heller, and David M. Blei 7.1 Introduction 7.2 Mixed membership models 7.3 Motivation 7.4 Decorrelating prevalence and proportion 7.5 Related models 7.6 Empirical studies 7.7 Discussion References 8 Discovering nonbinary hierarchical structures with Bayesian rose trees Charles Blundell, Yee Whye Teh, and Katherine A. Heller 8.1 Introduction 8.2 Prior work 8.3 Rose trees, partitions and mixtures 8.4 Greedy Construction of Bayesian Rose Tree Mixtures 8.5 Bayesian hierarchical clustering, Dirichlet process models and product partition models 8.6 Results 8.7 Discussion References 9 Mixtures of factor analyzers for the analysis of high-dimensional data Geoffrey J. McLachlan, Jangsun Baek, and Suren I. Rathnayake 9.1 Introduction 9.2 Single-factor analysis model 9.3 Mixtures of factor analyzers 9.4 Mixtures of common factor analyzers (MCFA) 9.5 Some related approaches 9.6 Fitting of factor-analytic models 9.7 Choice of the number of factors q 9.8 Example 9.9 Low-dimensional plots via MCFA approach 9.10 Multivariate t-factor analysers 9.11 Discussion Appendix References 10 Dealing with Label Switching under model uncertainty Sylvia Fruhwirth-Schnatter 10.1 Introduction 10.2 Labelling through clustering in the point-process representation 10.3 Identifying mixtures when the number of components is unknown 10.4 Overfitting heterogeneity of component-specific parameters 10.5 Concluding remarks References 11 Exact Bayesian analysis of mixtures Christian .P. Robert and Kerrie L. Mengersen 11.1 Introduction 11.2 Formal derivation of the posterior distribution References 12 Manifold MCMC for mixtures Vassilios Stathopoulos and Mark Girolami 12.1 Introduction 12.2 Markov chain Monte Carlo methods 12.3 Finite Gaussian mixture models 12.4 Experiments 12.5 Discussion Acknowledgements Appendix References 13 How many components in a finite mixture? Murray Aitkin 13.1 Introduction 13.2 The galaxy data 13.3 The normal mixture model 13.4 Bayesian analyses 13.5 Posterior distributions for K (for flat prior) 13.6 Conclusions from the Bayesian analyses 13.7 Posterior distributions of the model deviances 13.8 Asymptotic distributions 13.9 Posterior deviances for the galaxy data 13.10 Conclusion References 14 Bayesian mixture models: a blood-free dissection of a sheep Clair L. Alston, Kerrie L. Mengersen, and Graham E. Gardner 14.1 Introduction 14.2 Mixture models 14.3 Altering dimensions of the mixture model 14.4 Bayesian mixture model incorporating spatial information 14.5 Volume calculation 14.6 Discussion References Index.

About the Author

Kerrie L. Mengersen, Queensland University of Technology, Australia. Christian P. Robert, Universite Paris-Dauphine, France. D. Michael Titterington, University of Glasgow, Scotland.

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