Dear all,
thanks in advance.
I need an information.
I have 4 different time series (number of daily google clicks in the last 3 years for 4 different medical keywords).
I want to compare the 4 time series, i.e. estimate whether the variation in these 3 years has been different between the keywords.
I wonder if it makes sense to use a mixed model with autoregressive error correlation.
Something like:
mixed numberofclicks.. indepvars. . . || i.keyword:, residuals(ar 1, t(time))
Thank you very much!
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