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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
  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:
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Search found 6 matches

by jbas
14 Jun 2021, 16:23
Forum: Models and estimation
Topic: Elasticities in MNL
Replies: 5
Views: 9873

Re: Elasticities in MNL

Hi, thanks for your reply.

It was precisely reading Train's that I wondered if my results were wrong. But I didn't clearly understood it.

Thanks a lot for the clarification.

J.
by jbas
09 Jun 2021, 10:24
Forum: Models and estimation
Topic: Elasticities in MNL
Replies: 5
Views: 9873

Elasticities in MNL

Hi all, I came up with a doubt taking a look at the calculation of elasticities in a multinomial logit. Shouldn't the elasticities and cross-elasticities sum up to 1 due to the IIA property? It can be seen in Apollo_example_3.r that this is not the case. And it is certainly not in my models either. ...
by jbas
24 Feb 2021, 17:19
Forum: Bug reports
Topic: Estimates not appearing
Replies: 4
Views: 10430

Re: Estimates not appearing

Sure, will do.
by jbas
19 Feb 2021, 15:51
Forum: Bug reports
Topic: Estimates not appearing
Replies: 4
Views: 10430

Re: Estimates not appearing

Thanks for your reply. Sure, here it is. ```{r Init, include=FALSE} print("To strive, to seek, to find, and not to yield.") ``` ```{r Libraries, include=FALSE} suppressWarnings(suppressMessages(library(apollo))) suppressWarnings(suppressMessages(library(dplyr))) ``` ```{r, include=FALSE} #...
by jbas
18 Feb 2021, 12:58
Forum: Model specification
Topic: Cross-nested specification
Replies: 1
Views: 3649

Cross-nested specification

Hi, I'm finding trouble in estimating a CNL specification that is slighlty different than that shown in the examples. In Apollo_example_6.r, as the manual explains, there are three nests; One for air and rail, One of Bus and Rail, and one in which Car is all alone. Since car is on its own, the nesti...
by jbas
18 Feb 2021, 11:29
Forum: Bug reports
Topic: Estimates not appearing
Replies: 4
Views: 10430

Estimates not appearing

Hi, I'm not sure whether this is a bug but or I'm doing something wrong, my apologies in advance if the latter. When running apollo_modelOutput(model) the output in the console does not show anything below Estimates: . Please, see this example, for instance: Model run using Apollo for R, version 0.2...