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Re: Re: st: Problem with ml maximize: numerical derivatives are approximate


From   Christopher Baum <kit.baum@bc.edu>
To   "statalist@hsphsun2.harvard.edu" <statalist@hsphsun2.harvard.edu>
Subject   Re: Re: st: Problem with ml maximize: numerical derivatives are approximate
Date   Wed, 1 Dec 2010 08:49:16 -0500

<>
On Dec 1, 2010, at 2:33 AM, Maarten wrote:

> I have done the latter, but recently I have learned from the latest
> edition of Gould et al. (2010) that you can also do the former and
> that than you can use some very convenient utilities/short-cuts.

Also note that all numeric objects in Mata are held in the equivalent of -double-, so there is no loss of precision. In addition Mata has a number of functions whose names start with -quad- which perform common computations in the equivalent of quad precision.

Kit

Kit Baum   |   Boston College Economics & DIW Berlin   |   http://ideas.repec.org/e/pba1.html
                              An Introduction to Stata Programming  |   http://www.stata-press.com/books/isp.html
   An Introduction to Modern Econometrics Using Stata  |   http://www.stata-press.com/books/imeus.html


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