RE: st: RE: constraints in mlogit

["stata_user stata_user" <stata_dofile@hotmail.co.uk>]

Thanks, but we can use the lincom if we have for example linear reg of 
logistic regression, here I have like a two set of outputs of a logitistic 
reg and I can not see how to use the lincom here , I have seen that we can 
use  constraints(clist)
how I can use my outpus with the constraints

S.



> From: "Newson, Roger B" <r.newson@imperial.ac.uk>
> Reply-To: statalist@hsphsun2.harvard.edu
> To: <statalist@hsphsun2.harvard.edu>
> Subject: st: RE: constraints in mlogit
> Date: Mon, 14 Aug 2006 17:28:26 +0100
>
> Use the -lincom- command of official Stata to get confidence imtervals
> and P-values for ratios of odds ratios. To find out about -lincom-, type
> whelp lincom
> in Stata.
>
> Hope this helps.
>
> Roger
>
>
> Roger Newson
> Lecturer in Medical Statistics
> Respiratory Epidemiology and Public Health Group
> National Heart and Lung Institute
> Imperial College London
> Royal Brompton campus
> Room 33, Emmanuel Kaye Building
> 1B Manresa Road
> London SW3 6LR
> Tel: +44 (0)20 7352 8121 ext 3381
> Fax: +44 (0)20 7351 8322
> Email: r.newson@imperial.ac.uk
> www.imperial.ac.uk/nhli/r.newson/
>
> Opinions expressed are those of the author, not of the institution.
>
> -----Original Message-----
> From: owner-statalist@hsphsun2.harvard.edu
> [mailto:owner-statalist@hsphsun2.harvard.edu] On Behalf Of stata_user
> stata_user
> Sent: 14 August 2006 17:13
> To: statalist@hsphsun2.harvard.edu
> Subject: st: constraints in mlogit
>
> Hi,
> It is possible to test if two paramters are statistically equal in a
> mlogit?
>
> Let Y a discrete variable with 3 categories y1 y2 y3
>
> X1 continuous
> X2 binary
>
> I consider mlogit Y X1 X2
>
> y1 is the reference
>
> I obtain two paramters for each of X1 and X2 for the comparisons y2 vs
> y1
> and y3 vs y1
>
> For example for X1:
>
> let b21 be the parameter for the comparison y2 vs y1
> let b31 be the parameter for the comparison y3 vs y1
>
> How I can test H0: b21=b31
>
> thanks
>
> S.
>
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