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Re: st: Re: STATA mistakes divisions!


From   William Buchanan <william@williambuchanan.net>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: Re: STATA mistakes divisions!
Date   Thu, 15 Mar 2012 08:05:33 -0700

Francesco,

If the question that you are trying to wrestle with is how the results from SAS and Stata (not STATA as some folks may remind you), then it's best to provide some indication of the model (such as the syntax you used) to generate the results.  Here you didn't mention whether your point estimates and/or standard errors were different.  If your standard errors are different, it might be possible that the model that you fit was not equivalent in Stata or that the vce method used for your model was not the same method used by SAS.  

Best,
Billy



On Mar 15, 2012, at 7:48 AM, Francesco Vidoli wrote:

> But therefore by default, without writing in every division "float",
> STATA mistake divisions?
> It's not only a visualization problem, we are trying to compare a SAS
> OLS regression and  results simply do not add up if you calculate the
> variables of SAS or STATA ...
> 
> thanks,
> 
> On Thu, Mar 15, 2012 at 3:37 PM, Austin Nichols <austinnichols@gmail.com> wrote:
>> Francesco Vidoli <fvidoli@gmail.com>:
>> 
>> . di %30.27g 45315 / 19657
>>            2.3052856488782623
>> 
>> . di %30.27g float(45315 / 19657)
>>            2.3052856922149658
>> 
>> 
>> On Thu, Mar 15, 2012 at 10:28 AM, Francesco Vidoli <fvidoli@gmail.com> wrote:
>>> Hello,
>>> I just realized that STATA mistake divisions at 7-8 decimal place!
>>> I know it sounds strange, but try to do 45315 / 19657 ....
>>> 
>>> SAS:      2.30528564887826
>>> STATA:  2,30528569221496
>>> Excel:    2,30528564887826
>>> Mathematica: http://www.wolframalpha.com/input/?i=45315%2F19657
>>> 
>>> 
>>> It's not a good job for a scientific software!!
>> 
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