Modelling via normalisation for parametric and nonparametric inference
Kolossiatis, Michalis (2009) Modelling via normalisation for parametric and nonparametric inference. PhD thesis, University of Warwick.
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Official URL: http://webcat.warwick.ac.uk/record=b2317846~S15
Bayesian nonparametric modelling has recently attracted a lot of attention, mainly due to the advancement of various simulation techniques, and especially Monte Carlo Markov Chain (MCMC) methods. In this thesis I propose some Bayesian nonparametric models for grouped data, which make use of dependent random probability measures. These probability measures are constructed by normalising infinitely divisible probability measures and exhibit nice theoretical properties. Implementation of these models is also easy, using mainly MCMC methods. An additional step in these algorithms is also proposed, in order to improve mixing. The proposed models are applied on both simulated and real-life data and the posterior inference for the parameters of interest are investigated, as well as the effect of the corresponding simulation algorithms. A new, n-dimensional distribution on the unit simplex, that contains many known distributions as special cases, is also proposed. The univariate version of this distribution is used as the underlying distribution for modelling binomial probabilities. Using simulated and real data, it is shown that this proposed model is particularly successful in modelling overdispersed count data.
|Item Type:||Thesis or Dissertation (PhD)|
|Subjects:||H Social Sciences > HG Finance
H Social Sciences > HA Statistics
|Library of Congress Subject Headings (LCSH):||Mathematical statistics -- Research, Bayesian statistical decision theory, Mathematical models -- Research, Monte Carlo method, Markov processes|
|Institution:||University of Warwick|
|Theses Department:||Department of Statistics|
|Supervisor(s)/Advisor:||Steel, Mark F. J. ; Griffin, Jim E.|
|Sponsors:||Engineering and Physical Sciences Research Council (Great Britain) (EPSRC) ; University of Warwick. Centre for Research in Statistical Methodology (CRiSM) ; Cyprus. Hypourgeio Oikonomikōn [Cyprus. Ministry of Finance] (C.MoF)|
|Format of File:|
|Extent:||206 leaves : charts|
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