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 2 matches

by Xin-Yu Zuo
23 Apr 2025, 07:31
Forum: Model specification
Topic: Handling the dichotomous latent variable
Replies: 3
Views: 190984

Re: Handling the dichotomous latent variable

Hello, I have a related question regarding this issue.
As you mentioned, I need to use a binary logit model for the measurement equation, since the indicators are 0-1 binary variables.

For the structural equation, I’m expressing it as:
LV = f(socio-economic variables) + η*

The issue I’m facing is ...
by Xin-Yu Zuo
22 Apr 2025, 13:22
Forum: Errors during model validation and/or estimation.
Topic: Request for Help with Error in Estimating ICLV+LC Model
Replies: 1
Views: 20289

Request for Help with Error in Estimating ICLV+LC Model

Hi everyone,

I’m currently estimating a latent class model with one latent variable in Apollo, and I’ve encountered an issue during the estimation phase. I would really appreciate any insights or suggestions you might have.

Here’s the setup of my model:
1.It has two latent classes:
Class 1 follows ...