st: tsset repeated value problems

[<jmellis@uchicago.edu>]

I'm trying to create a time series from a dataset with 
values for month, date, and year; however, multiple events 
happened on the same month and even year. Is there any way 
that I can use tsset without getting the r(451) ("repeated 
time values") error?

Thanks,

Justin Ellis
University of Chicago
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