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  1. This forum is for questions related to the use of Apollo. We will answer some general choice modelling questions too, where appropriate, and time permitting. We cannot answer questions about how to estimate choice models with other software packages.
  2. There is a very detailed manual for Apollo available at http://www.ApolloChoiceModelling.com/manual.html. This contains detailed descriptions of the various Apollo functions, and numerous examples are available at http://www.ApolloChoiceModelling.com/examples.html. In addition, help files are available for all functions, using e.g. ?apollo_mnl
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    3. Check the frequently asked questions section on the Apollo website, which discusses some common issues/failures. Please see http://www.apollochoicemodelling.com/faq.html
    4. Make sure that R is using the latest official release of Apollo.
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Search found 4 matches

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by Andrew
09 Apr 2025, 10:02
Forum: Model estimation
Topic: Latent Class model with EM algorithm
Replies: 6
Views: 89781

Re: Latent Class model with EM algorithm

David, thank you very much for the detailed reply. And the paper by Burke et al. was indeed new to me - very interesting! When reviewers asked whether the heterogeneity in my LC model was due to preferences or survey behavior, I often responded with a reference to Hess & Train. I know from ...
by Andrew
07 Apr 2025, 09:55
Forum: Model estimation
Topic: Latent Class model with EM algorithm
Replies: 6
Views: 89781

Re: Latent Class model with EM algorithm

Hi David,

Thank you very much! So far I have used Stata (lclogit, lclogit2, gllamm) for latent class models. I used these to generate hypotheses and hardly ever changed the starting values. Could you share more about starting values or recommend a paper on the topic? Or is there a new Apollo manual ...
by Andrew
25 Mar 2025, 15:00
Forum: Model estimation
Topic: Latent Class model with EM algorithm
Replies: 6
Views: 89781

Re: Latent Class model with EM algorithm

Dear Stephane,

thank you very much!

If I change the delta_a in the model parameters of the EM model from 0 to 0.5 or another number, I get a result that is identical to the other model. Since I'm just starting with Apollo, I'm a little unsure which model I should use to estimate. Perhaps the ...
by Andrew
11 Mar 2025, 10:53
Forum: Model estimation
Topic: Latent Class model with EM algorithm
Replies: 6
Views: 89781

Latent Class model with EM algorithm

Dear team and Apollo users,

I have only recently started working with Apollo. I also use Stata. I was able to estimate the first models and also reproduce an LC model that I had previously estimated with Stata. Below is the code of my LC model. My dataset is based on a traditional DCE with 2 ...

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