Hi Prof. Hess,
Thank you for your recommendation, but i have question regarding to "fix the coefficient to zero for one utility". Which should I set to fix (zero)? Are there any considerations that I should pay attention to to determine this?
Best regards,
Rahardianto
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
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Search found 2 matches
- 22 Jun 2023, 14:33
- Forum: Model specification
- Topic: Error of Specification Issue - Parameter doesnt influence the log-likelihood of your model
- Replies: 3
- Views: 4376
- 17 Jun 2023, 12:05
- Forum: Model specification
- Topic: Error of Specification Issue - Parameter doesnt influence the log-likelihood of your model
- Replies: 3
- Views: 4376
Error of Specification Issue - Parameter doesnt influence the log-likelihood of your model
Dear developers, I want to use "Simple MNL model on mode choice SP data" to do estimation. Below is the code and I got following error: Testing influence of parameters............................. Error in apollo_estimate(apollo_beta, apollo_fixed, apollo_probabilities, : SPECIFICATION ISS...