Important: Read this before posting to this forum

  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
  3. Before asking a question on the forum, users are kindly requested to follow these steps:
    1. Check that the same issue has not already been addressed in the forum - there is a search tool.
    2. Ensure that the correct syntax has been used. For any function, detailed instructions are available directly in Apollo, e.g. by using ?apollo_mnl for apollo_mnl
    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.
  4. If the above steps do not resolve the issue, then users should follow these steps when posting a question:
    1. provide full details on the issue, including the entire code and output, including any error messages
    2. posts will not immediately appear on the forum, but will be checked by a moderator first. We check the forum at least twice a week. It may thus take a couple of days for your post to appear and before we reply. There is no need to submit the post multiple times.

Search found 4 matches

by siqifeng
23 Mar 2026, 17:19
Forum: Examples (existing and requests for new ones)
Topic: HB: Retrieving iteration-level draws of random parameters
Replies: 1
Views: 639

HB: Retrieving iteration-level draws of random parameters

Hello!

I wonder if we can retrieve iteration-level draws of random parameters in hierarchical Bayesian estimation. We do have individual-level posterior means, which should be calculated using these draws. I want to analyze the distribution of posterior/conditional means across a sample, say, \beta ...
by siqifeng
22 Jul 2024, 00:04
Forum: Model specification
Topic: HB model specification
Replies: 5
Views: 15049

Re: HB model specification

Thank you very much for the clarification! I'm sorry that I haven't checked the forum in a while (until IATBR 2024). I see that the HB and classical estimation are specified differently in Apollo, although both assume normally distributed random parameters.
by siqifeng
13 Jun 2024, 21:52
Forum: Model specification
Topic: HB model specification
Replies: 5
Views: 15049

Re: HB model specification

Thank you for the response, Stephane! I did read the manual carefully, but I'm not familiar enough with Bayesian estimation.

Siqi
by siqifeng
13 Jun 2024, 04:41
Forum: Model specification
Topic: HB model specification
Replies: 5
Views: 15049

HB model specification

Hi!

I have a question about the hierarchical Bayes (HB) model specification. On the webpage of example files and data, Hybrid_with_OL_and_MMNL_bayesian seems to be the counterpart of Hybrid_with_OL_and_MMNL, but the former specifies a single random beta:
b_brand_Artemis = b_brand_Artemis_base ...