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RE: st: backed up


From   sun samn <shwshang@hotmail.com>
To   <statalist@hsphsun2.harvard.edu>
Subject   RE: st: backed up
Date   Wed, 30 Jun 2010 03:00:50 +0800


Good point. I never thought of  the concave problem before. But my question is about GMM-to minimize a quadratic form, the concave is not a problem, is it?
thanks!



> Date: Sun, 27 Jun 2010 13:42:46 -0500
> Subject: Re: st: backed up
> From: skolenik@gmail.com
> To: statalist@hsphsun2.harvard.edu
> 
> On Sun, Jun 27, 2010 at 12:46 PM, sun samn <shwshang@hotmail.com> wrote:
>>   Thanks for your response. What do you mean by 'iterations being concave'? I did encounter another situation--the same number kept being iterated but cannot converge.
> 
> The objective function you maximize must be concave.
> 
> -- 
> Stas Kolenikov, also found at http://stas.kolenikov.name
> Small print: I use this email account for mailing lists only.
> 
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