Notice: On April 23, 2014, Statalist moved from an email list to a forum, based at statalist.org.
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: st: Including components of a summative score in regression
From
Donald Spady <[email protected]>
To
[email protected]
Subject
Re: st: Including components of a summative score in regression
Date
Tue, 31 Jul 2012 09:40:12 -0600
Maarten
Thanks for the reference. I'll try and get it at my University library.
Don
On 2012-07-31, at 1:35 AM, Maarten Buis <[email protected]> wrote:
> At 02:46 PM 7/30/2012, Donald Spady wrote:
>>> I am doing some logistic regression analysis, some of the variables of
>>> which are made up of the values of other variables; e.g. N = A + B + C/D.
>>> Is it reasonable, or appropriate, to include A, B, C, or D in the
>>> equation if N is already in it.
>
> On Mon, Jul 30, 2012 at 11:12 PM, Richard Williams wrote:
>> I believe the improvements in fit stem from
>>
>> * N constrains the coefficients of A and B and C/D to be equal; adding A and
>> B relaxes two of those constraints.
>
> Also see:
> M.L. Buis (2012) "Stata tip 108: On adding and constraining", The
> Stata Journal, 12(2), pp. 342-344.
>
> Hope this helps,
> Maarten
>
> --------------------------
> Maarten L. Buis
> Institut fuer Soziologie
> Universitaet Tuebingen
> Wilhelmstrasse 36
> 72074 Tuebingen
> Germany
>
>
> http://www.maartenbuis.nl
> --------------------------
> *
> * For searches and help try:
> * http://www.stata.com/help.cgi?search
> * http://www.stata.com/support/statalist/faq
> * http://www.ats.ucla.edu/stat/stata/
>
Donald Spady
--
[email protected]
*
* For searches and help try:
* http://www.stata.com/help.cgi?search
* http://www.stata.com/support/statalist/faq
* http://www.ats.ucla.edu/stat/stata/