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Imputation for categorical variables

Posts: 45

Imputation for categorical variables

Hello Everyone,

I was just wondering what the best imputation method for categorical variables is. Considering many categorical variables (with exception of variables such as postcodes etc) dont have too many levels, will it not be misleading to impute their missing values?


I have always thought creating a 'one-size-fits-all' variable such as CCC and imputing that for every missing level might be more reasonable. Can someone help out with any ideas or suggestions?


Respected Advisor
Posts: 3,055

Re: Imputation for categorical variables

There's lots of discussion of this subject if you go to your favorite search engine and type in


imputing categorical variables

Paige Miller
Super User
Posts: 23,771

Re: Imputation for categorical variables

That's why you do multiple imputation to reduce chance of bias AND to understand the effect of the imputation. 


This isn't a SAS question though, it's a statistics question better answered by statisticians or Google. 

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