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Re: st: example about choice experiment datasheet


From   elisabetta capobianco <elisabetta.capobianco@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: example about choice experiment datasheet
Date   Fri, 23 Nov 2012 12:05:52 +0100

Dear Arne,
i need to estimate the marginal effect of levels on attributes of my choice.
Is it possible?
es:
about meat:
attribute   level
label        organic/not organic
origin       local abroad
prize        4/8

I would know the utility for each level of each attribute.

Thank you!
elisabetta



2012/11/21 elisabetta capobianco <elisabetta.capobianco@gmail.com>:
> Thank you so much Arne!!!
> I'm creating the data set and then i'll try to run in Stata!
>
> Elisabetta
>
> 2012/11/20 Arne Risa Hole <arnehole@gmail.com>:
>> Elisabetta
>>
>> -mlogit- is not very useful to model data from choice experiments as
>> it does not allow alternative-specific explanatory variables.
>> -asclogit- requires your data to be in long form (one row per
>> alternative); see -help asclogit- and the first example in the paper I
>> mentioned in my last email.
>>
>> Arne
>>
>> On 20 November 2012 10:04, elisabetta capobianco
>> <elisabetta.capobianco@gmail.com> wrote:
>>> Thank you Arne, I want to use asclogit and mlogit for my choice modelling.
>>>
>>>
>>> 2012/11/19 Arne Risa Hole <arnehole@gmail.com>:
>>>> Elisabetta
>>>>
>>>> As Jay says the correct data form depends on the estimation command
>>>> you are planning to use, so this is a very important piece of
>>>> information that you haven't given us. You may find the examples in
>>>> http://www.stata-journal.com/article.html?article=st0133 useful.
>>>> Generally speaking the best strategy is to import the data into Stata
>>>> and then use commands like -reshape- to convert the data into the form
>>>> you want, rather than trying to do this in Excel.
>>>>
>>>> Arne
>>>>
>>>>> On 19 November 2012 15:51, elisabetta capobianco
>>>>> <elisabetta.capobianco@gmail.com> wrote:
>>>>>>
>>>>>> Thank you for your answer!
>>>>>> I want to do a mixed logit, but I have found a data set on help file
>>>>>> with just one choice set. I have 16 choice sets and I don't know how
>>>>>> to fil the excel data set.
>>>>>>
>>>>>>
>>>>>>
>>>>>> 2012/11/18 JVerkuilen (Gmail) <jvverkuilen@gmail.com>:
>>>>>> > On Sun, Nov 18, 2012 at 4:11 AM, elisabetta capobianco
>>>>>> > <elisabetta.capobianco@gmail.com> wrote:
>>>>>> >> Hi, I'm new of statalist and stata!
>>>>>> >> I'm working on choice experiment about food preferences in schools.
>>>>>> >> I have 4 alternatives unlabelled, 4 attributes and 4 levels, 130
>>>>>> >> individuals.
>>>>>> >> I have the data base in excel, but before insheet the file in stata
>>>>>> >> i'm not sure that i have put the data in the right mode in the excel
>>>>>> >> file.
>>>>>> >> Have you got an example on a excel datasheet about choice modelling?
>>>>>> >> Just an example to understand how to organize my datasheet.
>>>>>> >
>>>>>> > It depends on what analysis you want to use. -clogit- and procedures
>>>>>> > like it that are using alternative-specific predictors use the same
>>>>>> > basic format, which is specified in the help file. You can see the
>>>>>> > example dataset there. Essentially it is a "long" format like
>>>>>> > person-period in a growth model with time-varying covariates.
>>>>>> > *
>>>>>> > *   For searches and help try:
>>>>>> > *   http://www.stata.com/help.cgi?search
>>>>>> > *   http://www.stata.com/support/faqs/resources/statalist-faq/
>>>>>> > *   http://www.ats.ucla.edu/stat/stata/
>>>>>>
>>>>>>
>>>>>>
>>>>>> --
>>>>>> Rispetta l'ambiente: se non ti è necessario, non stampare questa mail
>>>>>>
>>>>>>
>>>>>>
>>>>>>           Le informazioni contenute in questa comunicazione e gli
>>>>>> eventuali documenti allegati
>>>>>>
>>>>>>           hanno carattere confidenziale e sono a uso esclusivo del
>>>>>> destinatario. Nel caso
>>>>>>
>>>>>>           questa comunicazione Vi sia pervenuta per errore, Vi informo
>>>>>> che la sua diffusione
>>>>>>
>>>>>>           e riproduzione è contraria alla legge e prego di darmi
>>>>>> prontamente avviso
>>>>>>
>>>>>>           e di cancellare quanto ricevuto. Grazie.
>>>>>>
>>>>>> *
>>>>>> *   For searches and help try:
>>>>>> *   http://www.stata.com/help.cgi?search
>>>>>> *   http://www.stata.com/support/faqs/resources/statalist-faq/
>>>>>> *   http://www.ats.ucla.edu/stat/stata/
>>>>>
>>>>>
>>>>
>>>> *
>>>> *   For searches and help try:
>>>> *   http://www.stata.com/help.cgi?search
>>>> *   http://www.stata.com/support/faqs/resources/statalist-faq/
>>>> *   http://www.ats.ucla.edu/stat/stata/
>>>
>>>
>>>
>>> --
>>> Rispetta l'ambiente: se non ti è necessario, non stampare questa mail
>>>
>>>
>>>
>>>           Le informazioni contenute in questa comunicazione e gli
>>> eventuali documenti allegati
>>>
>>>           hanno carattere confidenziale e sono a uso esclusivo del
>>> destinatario. Nel caso
>>>
>>>           questa comunicazione Vi sia pervenuta per errore, Vi informo
>>> che la sua diffusione
>>>
>>>           e riproduzione è contraria alla legge e prego di darmi
>>> prontamente avviso
>>>
>>>           e di cancellare quanto ricevuto. Grazie.
>>>
>>> *
>>> *   For searches and help try:
>>> *   http://www.stata.com/help.cgi?search
>>> *   http://www.stata.com/support/faqs/resources/statalist-faq/
>>> *   http://www.ats.ucla.edu/stat/stata/
>>
>> *
>> *   For searches and help try:
>> *   http://www.stata.com/help.cgi?search
>> *   http://www.stata.com/support/faqs/resources/statalist-faq/
>> *   http://www.ats.ucla.edu/stat/stata/
>
>
>
> --
> Rispetta l'ambiente: se non ti è necessario, non stampare questa mail
>
>
>
>           Le informazioni contenute in questa comunicazione e gli
> eventuali documenti allegati
>
>           hanno carattere confidenziale e sono a uso esclusivo del
> destinatario. Nel caso
>
>           questa comunicazione Vi sia pervenuta per errore, Vi informo
> che la sua diffusione
>
>           e riproduzione è contraria alla legge e prego di darmi
> prontamente avviso
>
>           e di cancellare quanto ricevuto. Grazie.



-- 
Rispetta l'ambiente: se non ti è necessario, non stampare questa mail



          Le informazioni contenute in questa comunicazione e gli
eventuali documenti allegati

          hanno carattere confidenziale e sono a uso esclusivo del
destinatario. Nel caso

          questa comunicazione Vi sia pervenuta per errore, Vi informo
che la sua diffusione

          e riproduzione è contraria alla legge e prego di darmi
prontamente avviso

          e di cancellare quanto ricevuto. Grazie.

*
*   For searches and help try:
*   http://www.stata.com/help.cgi?search
*   http://www.stata.com/support/faqs/resources/statalist-faq/
*   http://www.ats.ucla.edu/stat/stata/


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