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Re: st: question on gllamm for discrete latent variable with one factor structure


From   Hey Sky <heyskywalker@yahoo.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: question on gllamm for discrete latent variable with one factor structure
Date   Mon, 10 May 2010 12:36:28 -0700 (PDT)

hey, Kolenhikov

sorry for the not clearing message and thanks for your answer.

here is the message after the iteration stopped:

numerical derivatives are approximate flat or discontinuous region encountered
could not calculate numerical derivatives
missing values encountered
(error occurred in ML computation)
(use trace option and check correctness of initial model)


I am still not familiar with the gllamm options so that I think there must has something wrong 
in my code. I also have tried to do as what the example on gllamm manual chpater 5.2.1 p59
did, it does not work either and give the same message as above. 

the model should be ok since fortran code gives satisfied result. and I cannot use stata since 
the data center does not have it and not allowed to install it either.

here is what I tried and edu is a 0/1 dummy:

gen cons=1
eq: cons
eq: edu

gllamm dep indep, i(id) base(5) link(mlogit) family(binom) nip(2) ip(f) nrf(2) ///
  eq(cons mu2) dots trace


thanks for your kind answer again

Nan




----- Original Message ----
From: Stas Kolenikov <skolenik@gmail.com>
To: statalist@hsphsun2.harvard.edu
Sent: Sun, May 9, 2010 11:25:38 PM
Subject: Re: st: question on gllamm for discrete latent variable with one  factor structure

On Sun, May 9, 2010 at 3:25 PM, Hey Sky <heyskywalker@yahoo.com> wrote:
> I use gllamm to model people's choice among edu, wrkwt (work with training), wrknt (work without training)
>  and home (stay at home), panel data.  edu/wrknt/wrkwt/home are dummy variables.
>
> I have tried the following code, which takes Rabe-Hesketh's model 2 in notes GLLAMM models with discrete
> latent variables  as example. but my code does not work

"does not work" is a very broad term. Does it produce a syntax error?
Does it fail to converge? Does it produce the results that do not make
sense?

-- 
Stas Kolenikov, also found at http://stas.kolenikov.name
Small print: I use this email account for mailing lists only.

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