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re: st: Post codes to locality


From   Christopher Baum <kit.baum@bc.edu>
To   "statalist@hsphsun2.harvard.edu" <statalist@hsphsun2.harvard.edu>
Subject   re: st: Post codes to locality
Date   Mon, 23 Apr 2012 08:30:56 -0400

<>
Ronnie said

-merge- ? 

if postcode is common to both files then you should be able to -merge- and then keep if _merge == 3 no? 


Yes, that is precisely the point of the Stata FAQ I referenced. The easiest way to juxtapose aggregate characteristics (e.g. locality) with individual characteristics (e.g., postcode) is via a merge. The fact that the concordance between the two will have many non-matching observations matters not. As Ronnie said, you just throw them away by focusing on _merge==3, that is, those localities with at least one postcode represented in your sample.

Kit


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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