[Limdep Nlogit List] WTp estimation

[William Greene]

If you made the coefficient nonrandom, then you don't have the
variance term that you had in the previous specification.
/Bill Greene

On Tue, Jul 24, 2018 at 9:53 AM, medard kakuru via Limdep <
limdep at mailman.sydney.edu.au> wrote:

> Thanks Bill.
> I am facing another challenge. I use the wald command to estimate wtp after
> estimating a mixed logit with all non-attribute coefficients given a normal
> distribution and the syntax works. Since the standard deviation for one
> attribute was not significant, I re-specify the model and make that
> attribute non-random. Running the wald command after this specification
> gives me an error message that "wrong number of start values - need one for
> each label". What could be the problem?
>
> Thanks.
>
> Medard
>
> On Sun, Jul 22, 2018 at 12:35 AM, William Greene via Limdep <
> limdep at mailman.sydney.edu.au> wrote:
>
> > Medard.  WTP for all variants of the RP logit model is described in
> > Chapter N29.  That would be good for the S-MNL and GMXL.  I'm
> > not sure what the G-MNL model is.  WTP is generally a ratio of
> > coefficients, though in RP models, the WTP is computed for each
> > individual.  P values for LR statistics are generally not computed.
> > I'm not sure what the P-value at 5% is.  You can use CALC to look
> > up critical values for chi-squared if you wish.  The function
> > CTB(prob,df) returns the critical value for probability prob with
> > degrees of freedom df.
> > Regards
> > /Bill Greene
> >
> > On Fri, Jul 20, 2018 at 5:22 AM, medard kakuru via Limdep <
> > limdep at mailman.sydney.edu.au> wrote:
> >
> > > Dear All,
> > > Kindly help me with the syntax for wtp in preference space. I am
> running
> > > S-MNL, G-MNL and the GMXL models and want to compare WTP estimates for
> > the
> > > three models. I also want to compare these estimates with those
> obtained
> > > from wtp-space model estimations. I understand that for a simple MXL
> > model,
> > > the syntax for wtp is just a ratio of attribute and cost coefficients.
> Is
> > > it the case with the models I am estimating? I expected to find the
> > syntax
> > > in the Nlogit manual (section N33) but it's not listed.
> > >
> > >
> > > Secondly, I have seen the syntax for carrying out a loglikelihood ratio
> > > test and the syntax gives the LR statistic. How do i go further to get
> a
> > > p-value (say at 5%) for the statistic?
> > >
> > > Thanks in advance.
> > >
> > > Regards, Medard
> > > _______________________________________________
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> > > Limdep at mailman.sydney.edu.au
> > > http://limdep.itls.usyd.edu.au
> > >
> > >
> >
> >
> > --
> > William Greene
> > Department of Economics
> > Stern School of Business, New York University
> > 44 West 4 St., 7-90
> > New York, NY, 10012
> > URL: https://protect-au.mimecast.com/s/z0XiCp8AJQtXWMyySPpp7C?domain=people.stern.nyu.edu
> > Email: wgreene at stern.nyu.edu
> > Ph. +1.212.998.0876
> > Editor in Chief: Journal of Productivity Analysis
> > Editor in Chief: Foundations and Trends in Econometrics
> > Associate Editor: Economics Letters
> > Associate Editor: Journal of Business and Economic Statistics
> > Associate Editor: Journal of Choice Modeling
> > _______________________________________________
> > Limdep site list
> > Limdep at mailman.sydney.edu.au
> > http://limdep.itls.usyd.edu.au
> >
> >
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>


-- 
William Greene
Department of Economics
Stern School of Business, New York University
44 West 4 St., 7-90
New York, NY, 10012
URL: https://protect-au.mimecast.com/s/z0XiCp8AJQtXWMyySPpp7C?domain=people.stern.nyu.edu
Email: wgreene at stern.nyu.edu
Ph. +1.212.998.0876
Editor in Chief: Journal of Productivity Analysis
Editor in Chief: Foundations and Trends in Econometrics
Associate Editor: Economics Letters
Associate Editor: Journal of Business and Economic Statistics
Associate Editor: Journal of Choice Modeling