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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   Wed, 21 Nov 2012 12:34:56 +0100

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/



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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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