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Gaby said
Indeed my Governorate variable had differnt values in each dataset. I
have corrected them and it seems Ok now.
Indeed if I would have looked carfully at the _merge variable I
wouldn't have spent hours figuring out what was the problem.
I have typed: merge Governorate using dataset2, nokeep
As I recommended, careful examination of the _merge variable is always
a good idea. I personally would not use the nokeep option. You can
always
drop if _merge == 2
to achieve the same thing after checking that you're not dropping
something you shouldn't.
I strongly suggest you use the uniqusing option (as discussed in IMEUS
and ISP) when merging an area-level dataset onto an individual-level
dataset. Generally it is a good idea to use unique, uniqmaster or
uniqusing as appropriate whenever merging to guard against coding
errors. So I would use
merge Governorate using dataset2, uniqusing
tab _merge
(after ensuring that _merge is showing what it should)
drop if _merge < 3
drop _merge
Kit Baum | Boston College Economics & DIW Berlin | http://ideas.repec.org/e/pba1.html
An Introduction to Stata Programming
| http://www.stata-press.com/books/isp.html
An Introduction to Modern Econometrics Using Stata | http://www.stata-press.com/books/imeus.html
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