1. Главная
  2. Ресурсы
  3. Библиотечный поиск
Fully conditionalspecification inmultivariateimputation Stef van BuurenJaap BrandCatharina G. M.Groothuis‐Oudshoorn2006 год

Fully conditional specification in multivariate imputation
статья из журнала

Полный текстСтраница публикацииПубликация в OpenAlex
Аннотация: The use of the Gibbs sampler with fully conditionally specified models, where the distribution of each variable given the other variables is the starting point, has become a popular method to create imputations in incomplete multivariate data. The theoretical weakness of this approach is that the specified conditional densities can be incompatible, and therefore the stationary distribution to which the Gibbs sampler attempts to converge may not exist. This study investigates practical consequences of this problem by means of simulation. Missing data are created under four different missing data mechanisms. Attention is given to the statistical behavior under compatible and incompatible models. The results indicate that multiple imputation produces essentially unbiased estimates with appropriate coverage in the simple cases investigated, even for the incompatible models. Of particular interest is that these results were produced using only five Gibbs iterations starting from a simple draw from observed marginal distributions. It thus appears that, despite the theoretical weaknesses, the actual performance of conditional model specification for multivariate imputation can be quite good, and therefore deserves further study.
Год издания: 2006
Авторы: Stef van Buuren, Jaap Brand, Catharina G. M. Groothuis‐Oudshoorn, Donald B. Rubin
Издательство: Taylor & Francis
Источник: Journal of Statistical Computation and Simulation
Ключевые слова: Statistical Methods and Bayesian Inference, Bayesian Methods and Mixture Models, Advanced Statistical Methods and Models
Другие ссылки: Journal of Statistical Computation and Simulation (HTML)
Data Archiving and Networked Services (DANS) (PDF)
Data Archiving and Networked Services (DANS) (HTML)
LA Referencia (Red Federada de Repositorios Institucionales de Publicaciones Científicas) (PDF)
LA Referencia (Red Federada de Repositorios Institucionales de Publicaciones Científicas) (HTML)