No Standard Error
Posted: 02 Aug 2021, 16:30
Hi Apollo Community!
Congratulations on the fantastic package !!
I am very new to discrete choice modeling, but I have to create a model for my thesis, and my supervisor suggested apollo.
Apologies for the very basic questions! (Still learning)
I have written the code and managed to create the five-level nesting structure that I need.
However, since I have too many alternatives (27) and a lot of independent variables (17 per alternative), the model ends up being very complicated.
I have created a test dataset ( to make sure that it runs properly and I have NA in all: s.e., t.rat.(0) , Rob.s.e. & Rob.t.rat.(0))
I do not know if the problem comes from the test data set (do I need more individuals (currently have 188))? Is there a problem with my model nesting structure?
I have read on the forum about bootstrap and tried it but had no luck!
I have also read somewhere in the forum that it is advised to start working on simpler models and then progressively making it complicated, but I have no idea on how this procedure is done? Do we start with less variables in the model? with a simpler nesting structure?
I would appreciate any help or advice!
Thank you very much!
Best Regards,
Vivian
Congratulations on the fantastic package !!
I am very new to discrete choice modeling, but I have to create a model for my thesis, and my supervisor suggested apollo.
Apologies for the very basic questions! (Still learning)
I have written the code and managed to create the five-level nesting structure that I need.
However, since I have too many alternatives (27) and a lot of independent variables (17 per alternative), the model ends up being very complicated.
I have created a test dataset ( to make sure that it runs properly and I have NA in all: s.e., t.rat.(0) , Rob.s.e. & Rob.t.rat.(0))
I do not know if the problem comes from the test data set (do I need more individuals (currently have 188))? Is there a problem with my model nesting structure?
I have read on the forum about bootstrap and tried it but had no luck!
I have also read somewhere in the forum that it is advised to start working on simpler models and then progressively making it complicated, but I have no idea on how this procedure is done? Do we start with less variables in the model? with a simpler nesting structure?
I would appreciate any help or advice!
Thank you very much!
Best Regards,
Vivian