ApolloChoiceModelling forum

Hi Tim let us assume you have the following situation: model 1: V = beta_x * x + ... model 2: V = beta_xinc * x_inc + beta_xdec * x_dec + ... where x_inc = (x>x0)*(x-x0) and x_dec = (x<x0)*(x-x0) not that in this notation, x_dec will be negative, which will help us with the comparison As only differ...

Tim

could you please also share the output?

Thanks

Hi Tim

Could you please share your code and the full output you see so we can investigate?

Thanks

Stephane

Peter whether the second is correct depends on what happens in your data. In theory, and this is a point that is misunderstood by many, you should always have a full set of ASCs. This is where the distinction that people make between "labelled" and "unlabelled" is not helpful. Ra...

Peter

only differences in utility matter. If the ASCs are not random, then it makes no difference which ASC you normalise. The differences between them will remain the same

Stephane

Hi Rafael in Apollo, latent variables are just random components in the same way as random coefficients in a mixed logit model. Whether or not they are correlated depends entirely on you and the specification you use. So if you have: apollo_draws = list( ... interNormDraws = c("eta1","...

Hi Jose one initial comment. You have 15 continuous random parameters in your model, but you're using Halton draws. Please try to use some other type of draws. Beyond say 5 dimensions, Halton draws are so highly colinear that they should not be used. In terms of what you need, I've writen the below ...

Hi Jose when combining latent class with continuous mixtures, there are several different ways of doing so, especially a distinction between mixing inside the classes and mixing of the class allocation probabilities. A generic function like the apollo_conditionals or apollo_lcConditionals would then...

Hi in estimation, you maximise the log-likelihood of the joint model, i.e. the object P[["model"]] which is given as the product of the RP and SP choices. But in prediction, you obviously predict individual choices, not products of RP and SP choices. That's why in prediction, if your model...

Hi this happens automatically. Please note this is explained on the website and in the manual. Here is the text from the website: How can I capture the panel structure of my data in Apollo? The treatment of panel data depends completely on the model being used. Whenever the data contains multiple ch...