Dear Statalist,
I am trying to merge together two datasets that look something like
this:
Data in memory
var1 var2 var3 [additional variables]
Using Data:
var1 var2 var3 [additional variables that I want to add to the data in
memory]
The problem I'm having is that the data in memory is not unique on these
three variables, but the using data is. I do not mind that the data in
memory is not unique on these variables, because there is a fourth
variable in the data in memory that makes them unique. But this
variable is not part of the using data. I just want to merge in
additional variables from the using data so that they can be added to
the data in the memory. I don't mind that the observations are repeated
in the data. After the merge I just want to have the same number of
observations that I began with in the data in memory. Here is what I
tried and the result:
.merge var1 var2 var3 using "C:\Data.dta", uniqmaster nokeep
variables var1 var2 var3 do not uniquely identify observations in the
master data
I'm sure that I am overlooking something very simple. Any help would be
appreciated.
Thanks,
David
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