Bayesian latent variable model for mixed continuous and ordinal responses with possibility of missing responses

E. Bahrami Samani and M. Ganjali

Journal of Applied Statistics, 2011, vol. 38, issue 6, 1103-1116

Abstract: A general framework is proposed for joint modelling of mixed correlated ordinal and continuous responses with missing values for responses, where the missing mechanism for both kinds of responses is also considered. Considering the posterior distribution of unknowns given all available information, a Markov Chain Monte Carlo sampling algorithm via winBUGS is used for estimating the posterior distribution of the parameters. For sensitivity analysis to investigate the perturbation from missing at random to not missing at random, it is shown how one can use some elements of covariance structure. These elements associate responses and their missing mechanisms. Influence of small perturbation of these elements on posterior displacement and posterior estimates is also studied. The model is illustrated using data from a foreign language achievement study.

Date: 2011
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DOI: 10.1080/02664763.2010.484485

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