I am interested in tracking changes in proportions over time and testing
for trend effects. I have a categorical variable with 11 categories that
is measured in aggregate data annually. I want to do some tests for
positive or negative trends in the shares in the categories. I know the
count of cases in each category and year and the overall annual total.
Does anyone have suggestions on how I can model this?
Regards,
--Alex Cavallo
Lexecon
(312) 322-0208 voice
(312) 322-0218 fax
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