Important: Read this before posting to this forum
- 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.
- 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
- Before asking a question on the forum, users are kindly requested to follow these steps:
- Check that the same issue has not already been addressed in the forum - there is a search tool.
- 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
- Check the frequently asked questions section on the Apollo website, which discusses some common issues/failures. Please see http://www.apollochoicemodelling.com/faq.html
- Make sure that R is using the latest official release of Apollo.
- Users can check which version they are running by entering packageVersion("apollo").
- Then check what is the latest full release (not development version) at http://www.ApolloChoiceModelling.com/code.html.
- To update to the latest official version, just enter install.packages("apollo"). To update to a development version, download the appropriate binary file from http://www.ApolloChoiceModelling.com/code.html, and install the package from file
- If the above steps do not resolve the issue, then users should follow these steps when posting a question:
- provide full details on the issue, including the entire code and output, including any error messages
- posts will not immediately appear on the forum, but will be checked by a moderator first. This may take a day or two at busy times. There is no need to submit the post multiple times.
Search found 3 matches
- 22 Feb 2021, 09:24
- Forum: Post-estimation analysis/use of results
- Topic: Comparing LL of the ICLV choice component with MMNL
- Replies: 5
- Views: 6666
Re: Comparing LL of the ICLV choice component with MMNL
Hi Stephane, Thank you for looking at my code and sharing your opinion. I have a question based on the comments you provided as follows: I was not aware that I purposefully fixed the standard deviations to 1. Could you please help me understand which part of the code leads to fixing the standard dev...
- 21 Feb 2021, 18:20
- Forum: Post-estimation analysis/use of results
- Topic: Comparing LL of the ICLV choice component with MMNL
- Replies: 5
- Views: 6666
Re: Comparing LL of the ICLV choice component with MMNL
Hi Stephan, Thank you for the prompt reply. I compared the final LL of the reduced ICLV with the final LL of the MMNL. My understanding was that the two should be approximately the same. However, for me, the reduced ICLV performs better than the MMNL. Please see the specifications below: MMNL: # ###...
- 21 Feb 2021, 15:32
- Forum: Post-estimation analysis/use of results
- Topic: Comparing LL of the ICLV choice component with MMNL
- Replies: 5
- Views: 6666
Comparing LL of the ICLV choice component with MMNL
Hi Stephane and David, I have a question regarding the comparison of LL value of the choice component of the ICLV model with the MMNL model. I use the same demographic variables for both the random variables and the latent variable as follows: ### Create random parameters apollo_randCoeff = function...