Interaction effect with ASC
Posted: 13 Jul 2021, 10:43
Hi Stephane!
I would like to use some sociodemographic variable in my utility function in order to analyse whether they have impact for choosing the opt-out alternative.
I saw you use this approach in apollo_example_3:
asc_bus_value = asc_bus + asc_bus_shift_female * female
asc_air_value = asc_air + asc_air_shift_female * female
asc_rail_value = asc_rail + asc_rail_shift_female * female
So in this case you analyse, whether female respondents prefer bus/air/rail relative to car and male respondents.
I tried to use in my case the following interaction effect:
asc_no_choice_value = asc_no_choice + asc_no_choice_shift_female * female
So I would like to analyse in this case, whether female respondents prefer no choice alternative relative to choice and male respondents.
However, what is the difference if I do not creat interactions but I also create a parameter for my sociodemographic variable and use that in my utility function of no choice alternative:
U(no choice) = asc_no_choice + b_female*female
Thank you for your help!
David
I would like to use some sociodemographic variable in my utility function in order to analyse whether they have impact for choosing the opt-out alternative.
I saw you use this approach in apollo_example_3:
asc_bus_value = asc_bus + asc_bus_shift_female * female
asc_air_value = asc_air + asc_air_shift_female * female
asc_rail_value = asc_rail + asc_rail_shift_female * female
So in this case you analyse, whether female respondents prefer bus/air/rail relative to car and male respondents.
I tried to use in my case the following interaction effect:
asc_no_choice_value = asc_no_choice + asc_no_choice_shift_female * female
So I would like to analyse in this case, whether female respondents prefer no choice alternative relative to choice and male respondents.
However, what is the difference if I do not creat interactions but I also create a parameter for my sociodemographic variable and use that in my utility function of no choice alternative:
U(no choice) = asc_no_choice + b_female*female
Thank you for your help!
David