[Limdep Nlogit List] WTp estimation
William Greene
wgreene at stern.nyu.edu
Wed Jul 25 04:50:37 AEST 2018
That looks right to me.
/Bill Greene
On Tue, Jul 24, 2018 at 2:03 PM, Fredrik Carlsson <
fredrik.carlsson at economics.gu.se> wrote:
> You should most likely take away SD_pric from labels. I assume this was
> the label for the random price coefficient that is now fixed instead
>
> Fredrik
>
> Skickat från min iPhone
>
> > 24 juli 2018 kl. 19:56 skrev medard kakuru via Limdep <
> limdep at mailman.sydney.edu.au>:
> >
> > Dear Bill,
> > Precisely, this is what I am doing.
> >
> > WALD; Labels=colb,
> > colw,
> > colc,
> > tast,
> > tex,
> > smel,
> > siz,
> > pric,
> > SD_colb,
> > SD_colw,
> > SD_colc,
> > SD_tast,
> > SD_tex,
> > SD_siz,
> > SD_smel,
> > SD_pric
> > ;start=b
> > ;Var=Varb
> > ;Fn1=-1*(colb/pric)
> > ;Fn2=-1*(colw/pric)
> > ;Fn3=-1*(colc/pric)
> > ;Fn4=-1*(tast/pric)
> > ;Fn5=-1*(tex/pric)
> > ;Fn6=-1*(siz/pric)
> > ;Fn7=-1*(smel/pric)$
> >
> >
> > When I double click the B matrix, I see one column with 15 entries in it.
> > How am I supposed to use the entries in the specification above, since I
> > have arleady specified b as starting values?
> >
> > Thanks,
> >
> > Medard
> >
> >
> >
> > On Tue, Jul 24, 2018 at 8:42 PM, William Greene via Limdep <
> > limdep at mailman.sydney.edu.au> wrote:
> >
> >> Medard. Look at your output in the output window. Then, double click
> B in
> >> the
> >> project window, and you will see what is contained in B in the right
> >> order. When
> >> you use ;Start=B ; Var = Varb you can then use the right ;Labels =
> list...
> >> THEN
> >> set up your functions.
> >> /.B. Greene
> >>
> >> On Tue, Jul 24, 2018 at 12:34 PM, medard kakuru via Limdep <
> >> limdep at mailman.sydney.edu.au> wrote:
> >>
> >>> 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/JRujCJyp0qh0vkExsV5FgU?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
> >>>>>>>>
> >>>>>>> _______________________________________________
> >>>>>>> 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/JRujCJyp0qh0vkExsV5FgU?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/JRujCJyp0qh0vkExsV5FgU?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/JRujCJyp0qh0vkExsV5FgU?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
> >
> _______________________________________________
> 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/JRujCJyp0qh0vkExsV5FgU?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
More information about the Limdep
mailing list