| Re: combinning three files into one file [message #11499 is a reply to message #11297] |
Tue, 03 January 2017 16:08  |
Bridgette-DHS
Messages: 3214
Registered: February 2013
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Senior Member |
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Following is a response from Senior DHS Stata Specialist, Tom Pullum:
You have to be careful what you do with a combined file. It will not refer to a well-defined population. But if you insist on doing this, you should first reduce each file to the variables you want. Then open one of them; add the second with "append using...."; then add the third with "append using....." You can distinguish between the surveys with v001 or v007 or you can add some other identifier such as "survey" that is 1 for the first survey, 2 for the second survey, and 3 for the third survey.
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