Re: st: RE: Can I have different results from Stata13 depending on the OS?

[David Kantor <kantor.d@att.net>]

Hello,

I just want to add that I once had a situation in which I got 
different results in Stata MP vs. a single-processor version (of the 
same generation, I believe). I don't recall the details, but in the 
end, we decided to trust the Stata-MP result. Stata Technical Support 
explained that it had to do with MP making assumptions about what 
order some of the intermediary results could be computed -- or what 
could be concurrently. I could dig up the details of this matter, but 
at this point, the significant point is that, sometimes, MP can yield 
different results as compared to the single-processor version. 
Potentially, your two Statas could differ in that regard.
--David


At 05:54 PM 1/20/2014, David Radwin wrote in response to Erik Berwart:
> It is difficult to tell why your results might differ from the 
> limited information you provide here (see 
> http://www.stata.com/support/faqs/resources/statalist-faq/#stata). 
> Can you provide more details including sample data and code and actual output?
>
> You also might use publicly available datasets to compare results 
> from your installations with published accuracy test results. See 
> http://www.stata.com/support/cert/ for details.
>
> David
> --
> David Radwin, Senior Research Associate
> Education and Workforce Development
> RTI International
> 2150 Shattuck Ave. Suite 800, Berkeley, CA 94704
> Phone: 510-665-8274
>
> www.rti.org/education
>
>
> > -----Original Message-----
> > From: owner-statalist@hsphsun2.harvard.edu [mailto:owner-
> > statalist@hsphsun2.harvard.edu] On Behalf Of ERIK BERWART ARAYA
> > Sent: Monday, January 20, 2014 1:03 PM
> > To: statalist@hsphsun2.harvard.edu
> > Subject: st: Can I have different results from Stata13 depending on the
> > OS?
> >
> > Dear Statalisters,
> >
> > I have installed Stata in my mac and in a virtual machine of windows8
> > Last week the regression was taking a lot of time on windows so I decide
> > to see if things were faster in the Mac version. I was shocked to see the
> > results were different (I mean not only the magnitude of the coefficients
> > but the lvalues, therefore, the interpretation using each version of
> > outputs were completely different).
> >
> > Can anyone give me a hand here?
> >
> > Regards,
> >
> > Erik Berwart

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