[Limdep Nlogit List] WTp estimation

Wed Jul 25 02:34:55 AEST 2018

Thanks Bill.
However, I seem not to understand the matching and the submission you are
talking about. Kindly give me a reference in the nlogit manual so that I
read for more understanding.
Thanks.
Medard
On Tue, Jul 24, 2018, 19:03 William Greene via Limdep <
limdep at mailman.sydney.edu.au> wrote:

> Yes you can.  After estimation, double click on the B matrix and see what
> is in there.
> Match it up against your output.  Then submit B and VARB as the parameters
> and
> variance for the command.
> /B. Greene
>
> On Tue, Jul 24, 2018 at 11:52 AM, medard kakuru via Limdep <
> limdep at mailman.sydney.edu.au> wrote:
>
> > So i can't estimate wtp using the Wald command if one of the coeffecients
> > is nonrandom. I also get the same error message when I apply the wald
> > command after estimating a gmxl in utility space. Where could I be going
> > wrong?
> >
> > Thanks in advance.
> > Medard
> >
> > On Tue, Jul 24, 2018, 17:51 William Greene via Limdep <
> > limdep at mailman.sydney.edu.au> wrote:
> >
> > > 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
> > > > >>> _______________________________________________
> > > > >>> Limdep site list
> > > > >>> 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/oGUAClxwB5Cg8jQNiGQVT8?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
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> > > > >> _______________________________________________
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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/oGUAClxwB5Cg8jQNiGQVT8?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
> > >
> > >
> > _______________________________________________
> > Limdep site list
> > 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/oGUAClxwB5Cg8jQNiGQVT8?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
>
>