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re: st: Collapse with sum function and missing values: correction


From   Kit Baum <baum@bc.edu>
To   statalist@hsphsun2.harvard.edu
Subject   re: st: Collapse with sum function and missing values: correction
Date   Wed, 10 Feb 2010 10:08:18 -0500

<>
Sorry, misinterpreted Michael's grouse in the last message. I agree that the _sum_ of x should be missing, as should all other descriptive stats except the -count-. The -count- of non-missing values is zero, but their -sum- is surely missing --- as it would be reported by -tabstat-.

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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