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  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
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    1. Check that the same issue has not already been addressed in the forum - there is a search tool.
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    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
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Search found 998 matches

by stephanehess
03 Feb 2024, 14:05
Forum: Model estimation
Topic: Estimation of MNL and MMNL in WTP space issues
Replies: 5
Views: 1062

Re: Estimation of MNL and MMNL in WTP space issues

Hi

I also need to know the LL you get with MNL and in WTP space, please, i.e. where it runs out of iterations

Stephane
by stephanehess
01 Feb 2024, 11:15
Forum: Model estimation
Topic: Estimation of MNL and MMNL in WTP space issues
Replies: 5
Views: 1062

Re: Estimation of MNL and MMNL in WTP space issues

Hi

did you first try a model in preference space?

Stephane
by stephanehess
31 Jan 2024, 10:51
Forum: Estimation results
Topic: Interpretation of coefficients
Replies: 3
Views: 655

Re: Interpretation of coefficients

1. Again, it depends on the units. Imagine that I have b_cost = -0.1 and b_time = -0.05. You can't say that cost matters more than time as it depends on the units. Imagine that cost is in € and time is in minutes. Then what the above is telling us is that €1 is more important than 1 minute, but obvi...
by stephanehess
30 Jan 2024, 16:00
Forum: Model specification
Topic: Nested Logit-location choice joint with mode utility
Replies: 1
Views: 742

Re: Nested Logit-location choice joint with mode utility

Hi

I think the reason your model is not working at the moment is that you only have constants in the utilities, which makes it impossible to estimate a nesting structure

Regarding your second question, can you explain a bit more what you mean, please?

Thanks
by stephanehess
30 Jan 2024, 15:29
Forum: Installation and updating
Topic: Wrong results when using the latest version
Replies: 1
Views: 697

Re: Wrong results when using the latest version

hi,

it seems like there has been an issue with that model all along as the estimates are the same across classes, so this is not a version issue

We will look into it

Stephane
by stephanehess
30 Jan 2024, 15:02
Forum: Data preparation, processing and pre-estimation analysis
Topic: Effects coding MNL model and relative importance.
Replies: 1
Views: 784

Re: Effects coding MNL model and relative importance.

Ellis your model specification is correct, as is the calculation of the beta for the reference level and the relative importance calculation (though I'm not a fan of this). But it makes no sense to calculate p values for the reference category. Think about it this way. With categorical variables, th...
by stephanehess
30 Jan 2024, 14:52
Forum: Model specification
Topic: Latent Class Analysis with Nested Logit Model
Replies: 6
Views: 7262

Re: Latent Class Analysis with Nested Logit Model

Hi

we don't have ready built examples or models for sequential choice. There are many factors to consider, such as inter-dependencies, including of availabilities

Stephane
by stephanehess
30 Jan 2024, 14:48
Forum: Estimation results
Topic: Interpretation of coefficients
Replies: 3
Views: 655

Re: Interpretation of coefficients

hi

no, it cannot. All it tells you is that ONE UNIT of attribute 1 has more influence than ONE UNIT of attribute 2. So this all depends on the units, etc

Stephane
by stephanehess
30 Jan 2024, 14:45
Forum: Model specification
Topic: Are latent variables in Hybrid choice model correlated?
Replies: 7
Views: 5094

Re: Are latent variables in Hybrid choice model correlated?

Hi

can you show us the entire code as it's not clear where eta1 and eta2 are used as you later only use eta_LV1

But it's certainly possible, you just need to think about identification too

Stephane