st: Correlation for two years of data

["Kaganova, Yevgeniya" <ykaganova@rti.org>]

Dear Statlisters, I have two years of medical expenditures data for a
group of people. Each file has it's own weight -same person might have a
different weight in each year (like a proportion of year alive). I need
to find a correlation between the expenditures from two different years.
How to create a weight for that?

Thank you, Eugenia

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