
From  Danielle H Ferry <dferry@nber.org> 
To  statalist@hsphsun2.harvard.edu 
Subject  Re: st: RE: RE: Can you get sign of value only? 
Date  Thu, 23 Mar 2006 22:06:05 0500 
Note that the difference between this and using sign(y) is that sign(0) is 0. A quite different point is that there is another way to write what Jennifer is suggesting, namely gen z = cond(y < 0, x, x) Nick n.j.cox@durham.ac.uk
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