ApolloChoiceModelling forum

Hello all, it is my first post here since I am a beginner in this field.

I have a structural equation model based on Theory of Planned Behavior which I estimated using the Lavaan package. Now I intend to include these SEM results in an Apollo choice model using a sequential approach.

For what I have seen, I can include the SEM results as fixed parameters in apollo_beta, but then I am confused on how to specify parameters to be estimated for the latent variables in the utility functions. I would be thankful for any guidance on this topic.

Also, is there an apollo_example that deals with a similar situation?

Thank you in advance,

Diego.

Hi Diego

we do not have such an example, but it's quite easy to set this up. What you would do is to include all the parameters in apollo_beta, including those that com from the SEM, giving them the SEM results as starting values. You then also include the names of those parameters in apollo_fixed.

Stephane