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Re: st: dirifit

From   Viktor Slavtchev <>
Subject   Re: st: dirifit
Date   Wed, 05 Mar 2008 18:47:34 +0100

- Maarten
It works properly when using
I've got estimation based on 392 observations (there are 37 missings out of 429).
Hence, the problem seems to be in my dependent variable.
In order to be sure, I've generated random distributed independent but still get estimation for 60 cases.
Is there any possibility in -dirifit- to find out, which these 60 observations are?

Maarten buis wrote:

-- Viktor Slavtchev wrote:

I want to explain the share of time, that individuals spent in five alternatives (y1 - y5). Hence y1+y2+y3+y4+y5=1.
Therefore I run:
dirifit y1-y5, mu(x1 x2)
It works, however, for only 60 cases out of more than 500. In other words, the estimation is done for only 60 cases.
Indeed, there are exactly 60 individuals which spent their full time
in only one possibility.
That is weird, it should actually exclude all casses where one category
gets all the time or no time at all. -dirifit- works as expectd if I do
the following:

dirifit governing - urbanplanning, ///
mu( houseval popdens noleft minorityleft )

-- Maarten

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

visiting address:
Buitenveldertselaan 3 (Metropolitan), room Z434

+31 20 5986715

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