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RE: st: simulated data for logistic regression... remedial algebra help?


From   "Nick Cox" <n.j.cox@durham.ac.uk>
To   <statalist@hsphsun2.harvard.edu>
Subject   RE: st: simulated data for logistic regression... remedial algebra help?
Date   Tue, 20 Nov 2007 12:14:36 -0000

Richard is correct. 

FAQ     . . . . . . . . . . . . . .  The use of macros with the power
operator
        . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . W.
Gould
        12/99   I coded `a'^2 and got the wrong sign. Why?
                http://www.stata.com/support/faqs/lang/macpow.html 


Nick
n.j.cox@durham.ac.uk 

Richard Williams

At 10:37 PM 11/19/2007, Daniel Waxman wrote:

>There was a wicked exponentiation problem that took a few hours to 
>figure out (beware of how Stata evaluates the exponentiation of a 
>negative number... e.g. -2^2 evaluates to -4)

I swear there is a FAQ on this but I can't find it.  Anyway, yes, as far
as Stata is concerned, you are saying minus 2 squared, rather than
negative 2 squared, i.e. the dash is a minus sign, not a negative sign.


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