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st: MI questions
I need some advice. I'm attempting the following:
x1-x3 are not observed in dataset1, but I need them for theoretical
purposes. Therefore, I treat them as missing data in dataset1 and impute
them from dataset2 using demographic information common to both datasets.
My sequence of events is as follows:
1) append dataset1 to dataset2; in dataset2 I have demographics & x1-x3;
in dataset1 there's only demographics.
2) I then run Amelia II to fill in the missing values of dataset1 from
3) I then merge the imputed data with data in dataset1
Here's the problem: x1-x3, the imputed data, have negative values after
merging with dataset1. There shouldn't be negative values. These are
dichotomous 0-1 values when observed in dataset2. Needless to say, this
causes problems with estimation.
Can you please advise?
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