[Limdep Nlogit List] WTp estimation

[Fredrik Carlsson]

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/dMfpCgZowLHVRgVRCNQboG?domain=people.stern.nyu.edu
>> Email: wgreene at stern.nyu.edu
>> Ph. +1.212.998.0876
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>> 
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