[Limdep Nlogit List] WTp estimation

[William Greene]

exactly right.  I agree
Bill Greene

On Tue, Jul 24, 2018 at 10:01 AM, Fredrik Carlsson <
fredrik.carlsson at economics.gu.se> wrote:

> You have one less parameter, so reduce the number of parameters in the
> labels part of the Wald-command
>
> Fredrik
>
> Skickat från min iPhone
>
> > 24 juli 2018 kl. 15:53 skrev medard kakuru via Limdep <
> limdep at mailman.sydney.edu.au>:
> >
> > 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
> >> New York, NY, 10012
> >> URL: https://protect-au.mimecast.com/s/Mw61CP7yOZtyRGJ8Iz-9oj?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
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> >>
> >>
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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/Mw61CP7yOZtyRGJ8Iz-9oj?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