ApolloChoiceModelling forum

hi

I wonder if what is happening here is a version mix-up because some of your apollo function calls are using apollo:: and others are not.

Did you ensure you are running the latest version too?

Stephane

hi your attribute by attribute model basically failed immediately, i.e. did not estimate. I noticed you had an odd ] at the end of apollo_beta in one of your codes If you want me to debug this, then please send me your data and code and I'll have a look as it shouldn't afffect things at all Stephane

Hi simple fix. Have a look at your code. You have mnl_settings_RP$componentName = paste0("Class_",s) mnl_settings_SP$componentName = paste0("Class_",s) before you have: mnl_settings_RP = list( alternatives = c(local=1, metro=2, car=3, tw=4), ... so the list mnl_settings_RP does n...

David you are using randcoeff[["b_tc"]] = -exp( mu_log_b_tc + sigma_log_b_tc * draws_tc ) which means that the cost coefficient follows a negative lognormal distribution. A negative lognormal is a negative exponential of a Normal, so the parameters you are estimating are the mean and stand...

Jay

can you show us the output, please?

Thanks

Stephane

Hi I would in your case recommend option 1. Even when I treat income as a continuous variable in my models, I do not exclude people with missing data, nor do I assign them to another category. Rather, I estimate a different parameter for them, which would be in line with your idea to treat it as cat...

Hi I don't have any such example files, but like I said, this would all be accommodated by moving the apollo_panelProd call to be after apollo_lc. It's a very simply change for you to make For the class allocation model, you could then include covariates that vary across observations in the class al...

Paul

the order does not matter as they are indexed by name. So there must be another issue.

Did you compare the starting LL?

As an aside, I strongly suggesting using different starting values in the different classes

Stephane

yes, that's correct

Hi

there could be many reasons for this. Either there really is no effect (in which case that is a finding), or you don't have enough data, or a bad design. But this is a general question, not Apollo related

Stephane