| Gazing at the crisscrossing lines of Manhattan or the blue vastness of the oceans, I would feel something I could only describe as missingness. |
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| These methods use local properties of the likelihood to test for sensitivity to various assumptions about the missingness mechanism. |
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| A Bayesian methodology permits modeling different patterns of missingness under ignorability and nonignorability assumptions. |
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| This method permits modeling different patterns of missingness under ignorable and nonignorable assumptions, and a multinomial-Dirichlet model is used to estimate the cell probabilities which can help to predict the winner. |
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| Nevertheless, this missingness creates problems for international statistical agencies that may attempt to form estimates at the regional level as summary statistics. |
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| Care must be made in compensating for such missingness, since traditional statistical methods for treating nonresponse, such as imputation, are not straightforward in this context. |
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| However, there are difficulties in incorporating the complex design with typical multi-level models that are used in this type of longitudinal analysis, especially in the presence of drop-out missingness. |
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| This procedure leads to three missingness mechanisms. |
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| Some imputation models require the data to have a certain distribution of their missing values, their missingness pattern. |
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| In large scale surveys the assumption of missingness at random is untenable. |
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| The paper first analyses missingness differences in these three steps using a human survey dataset, and then compares different weighting approaches. |
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| These methods are very sensitive to assumptions made about the missingness mechanism or about the distributions of the variables with missing data. |
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| Missingness is a common feature of longitudinal studies. |
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