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Re: st: Dirifit help

From   Maarten buis <>
Subject   Re: st: Dirifit help
Date   Tue, 11 Nov 2008 09:09:42 +0000 (GMT)

--- Murali Kuchibhotla <> wrote:
> Thank you Maarten. It turns out that the dependent variables that I
> am trying to model(which are in the nature of proportions) take
> values which include 0 and 1. So dirifit seems inappropriate for this
> particular application. In your presentation however, you show that
> the fractional logit model can handle this constraint for the single
> dependent variable case. Does this also hold when modelling multiple
> dependent variables?

In principle yes, but you can't use -glm- for that, so you'll have to
program your own -ml- function for that. That is not as hard as it
sounds, see:

Hope this helps,

Maarten L. Buis
Department of Social Research Methodology
Vrije Universiteit Amsterdam
Boelelaan 1081
1081 HV Amsterdam
The Netherlands

visiting address:
Buitenveldertselaan 3 (Metropolitan), room N515

+31 20 5986715

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