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Re: st: sem - is it possible to drop error terms?


From   Stas Kolenikov <skolenik@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: sem - is it possible to drop error terms?
Date   Tue, 12 Mar 2013 13:59:22 -0500

Jacob,

you can constrain the variance of these error terms to zero with
-variance()- option of -sem-.

-- Stas Kolenikov, PhD, PStat (SSC)
-- Senior Survey Statistician, Abt SRBI
-- Opinions stated in this email are mine only, and do not reflect the
position of my employer
-- http://stas.kolenikov.name



On Tue, Mar 12, 2013 at 1:53 PM, John Antonakis <John.Antonakis@unil.ch> wrote:
> Hi Jacob:
>
> You need to be much more specific about what specific model you wish to test
> (write-out equations or syntax). Most probably don't know what ACE is:
>
> http://www.stata.com/support/faqs/resources/statalist-faq/
>
> Best,
> J.
>
> __________________________________________
>
> John Antonakis
> Professor of Organizational Behavior
> Director, Ph.D. Program in Management
>
> Faculty of Business and Economics
> University of Lausanne
> Internef #618
> CH-1015 Lausanne-Dorigny
> Switzerland
> Tel ++41 (0)21 692-3438
> Fax ++41 (0)21 692-3305
> http://www.hec.unil.ch/people/jantonakis
>
> Associate Editor
> The Leadership Quarterly
> __________________________________________
>
>
> On 12.03.2013 19:30, Jacob Felson wrote:
>>
>> I'm wondering if its possible to drop the error terms that are
>> included by default in sem models.  I've searched in the manual and
>> online but I can't find any indication that this is possible.  I
>> imagine its not, but I wanted to check with the experts to make sure.
>>
>> (I'm estimating a behavior genetic model with data on MZ and DZ twins
>> -- the so-called ACE model.)
>>
>>
>> Thank you,
>>
>>
>> Jacob Felson
>> *
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>
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