Questions tagged [multiple-imputation]
Use this tag for questions involving multiple imputation, which refers to a set of stochastic imputation routines aimed at preserving the multivariate features of the data.
557 questions
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Generating quartiles from an imputed variable
I am using Multiple Imputation to impute a continuous variable (X). I have a question regarding the generation of a new variable, starting from this imputed ...
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Curing noncoverage with hot-deck imputation?
Is it advisable to use hot-deck imputation to allow for poststratification in the presence of empty post-strata?
In a survey reweighting exercise, I have population totals for a complete cross-...
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Multiple regression with missing predictor variable
Suppose we are given a set of data of the form $(y,x_{1},x_{2},\cdots, x_{n})$ and $(y,x_{1},x_{2},\cdots, x_{n-1})$. We are given the task of predicting $y$ based on values of $x$. We estimate two ...
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Combining LASSO coefficients across imputed datasets
I am using the LASSO with multiple imputed datasets and I am not sure how should I combine the coefficients obtained on the different imputed datasets. I could simply average them (as I would do had I ...
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Clustering variables with outliers
I am performing a cluster analysis in SAS and some of the variables that I am trying to cluster contain outliers. I've tried to transform the data (log and/or standardize them) but didn't quite work ...
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How to estimate missing data?
I am running a regression with several independent variables with 32 observations (from 1975 to 2006 and they are yearly data). The issue here is that there does not exist any observation for one of ...
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Multiple imputation of time variables -- which step to impute?
Lets assume I have a survival analysis study with an exposure, two covariates, and two time related variables. Say date of diagnosis and date of death. Combined, the two time related variables will be ...
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