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Re: st: RE: ML numerical problems


From   Maarten buis <maartenbuis@yahoo.co.uk>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: RE: ML numerical problems
Date   Thu, 6 May 2010 03:02:23 -0700 (PDT)

--- On Thu, 6/5/10, Valerie Orozco wrote:
> But yours ideas din't really explain why the same function
> specification converges in Matlab, and doesn't in Stata...

The devil is in the details when it comes to such problems.
So, if you want an answer to that question you will have to 
give a lot more information. 

The three likely causes are 1) your collegue used more 
numerically stable computations, 2) your collegue provided
better starting values, 3) your collegue provided Matlab
with analytical first and/or second derivatives while you
used -lf-.

-- Maarten

--------------------------
Maarten L. Buis
Institut fuer Soziologie
Universitaet Tuebingen
Wilhelmstrasse 36
72074 Tuebingen
Germany

http://www.maartenbuis.nl
--------------------------


      

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