[Limdep Nlogit List] WTp estimation

[medard kakuru]

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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> >
>
>
> --
> William Greene
> Department of Economics
> Stern School of Business, New York University
> 44 West 4 St., 7-90
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