Delete outcome in mlogit result

[Jean Dewals]

Dear collegues !

I'm currently working on a mlogit model. During a consumers survey, I asked to consumers to select their preferred labelling schemes among a pool of nine alternatives.
Through my model, I search to determine which variables can influence the choice of one label rather than another.


For the moment, my code line is :

 mlogit rangtop i.recode_age i.genre revenumid revenusup deplittoral univ tradi prefgeo risqu_sanit effica_choix_conso connais_subj

It displays the result compare to my base outcome, here the "quality" scheme, for the eight others alternatives.


To test the IIA assumption, i would like to delete some outcomes in my mlogit model. For exemple, lets choose the "health" scheme. The variable rangtop contains the choice made by my consumers : Quality, health, nutrition, ecolabel, animal-welfare, local, france, EU, fair-trade. I tested the following code

 mlogit rangtop i.recode_age i.genre revenumid revenusup deplittoral univ tradi prefgeo risqu_sanit effica_choix_conso connais_subj if rangtop !="Health":rangtop

The problem is that it doesn't work. Results displayed still includes the health outcome ... So I wonder if you have any solution for me? I would like to perform an Hausman test right after.


Thank you for your help, I hope my exemple i clear for you, and I remain available if necessary.

Regards,

Jean-François

[Andrew Musau]

The variable rangtop contains the choice made by my consumers : Quality, health, nutrition, ecolabel, animal-welfare, local, france, EU, fair-trade.

If so, then why capitalize the category name?

rangtop !="Health":rangtop

This syntax is allowed

rangtop !="health":`:val lab rangtop'

but it seems easier to search the value itself and enter it directly.

lab list `:var lab rangtop'

[Jean Dewals]

Hello Andrew,

Thank a lot for your help, it works !

Best regards,

Jean-François