Thank you Stephane!
It helped a lot! This is a very interesting topic for me.
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 15 matches
- 19 Jun 2021, 07:44
- Forum: Models and estimation
- Topic: Choosing the best model
- Replies: 2
- Views: 7530
- 11 Jun 2021, 18:30
- Forum: Models and estimation
- Topic: Choosing the best model
- Replies: 2
- Views: 7530
Choosing the best model
Hi David and Stephane! I would like to ask how to choose the best fit model. 1. Which one is the most reliable information criterion? I would like to compare two MNL model. The second one is include several sociodemographic interactions, so have more parameters. I get lower log-likelihood, AIC and h...
- 28 Apr 2021, 17:32
- Forum: Post-estimation analysis/use of results
- Topic: Latent class model WTP and post-estimation
- Replies: 3
- Views: 5476
Latent class model WTP and post-estimation
Hi David and Stephane! I have two question for you. 1. How can I explain that, when I get extremely large WTP value for a certain attribute in case of latent class model (in one class). For example: I have price attribute with 1$, 1.5$, 2$, 2.5$ levels for my analysed product/service and in one clas...
- 28 Mar 2021, 22:05
- Forum: Data preparation, processing and pre-estimation analysis
- Topic: Price variable
- Replies: 2
- Views: 8881
Re: Price variable
Thank you for your help Stephane!
- 27 Mar 2021, 16:38
- Forum: Data preparation, processing and pre-estimation analysis
- Topic: Price variable
- Replies: 2
- Views: 8881
Price variable
Hi David and Stephane! I have a question about price variable. In my stated preference database, I have four levels (150, 250, 350, 450) for the price attribute. Is that a correct practice, if I divide by 100 these levels in my database and I use these levels (1.15, 2.5, 3.5, 4.5) for estimate model...