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RE: Missing values [was: RE: st: simple question]

From   Richard Williams <>
Subject   RE: Missing values [was: RE: st: simple question]
Date   Thu, 03 Jun 2004 10:13:56 -0500

At 04:54 PM 6/2/2004 -0700, David E Moore wrote:
Is it worth pointing out that SAS, which may be the most widely used stat
package on the planet, uses missing value codes almost exactly the same way that
Stata uses them. S-Plus uses an internal code (similar to old-style Stata's
Good points. I'm not a SAS user, so I'll concede my original complaint.

Is it also the case in SAS that if you say something like

regress y x if age > 40

you also get the missing cases on age included? That is the main other thing I dislike about Stata's handling of MD, although it is easy enough to work around so long as you are careful.

Mostly, though, if Stat/Transfer gets better at handling MD conversions, I'll be happy.

Richard Williams, Notre Dame Dept of Sociology
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