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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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Search found 8 matches

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by Sutsch
18 Jan 2022, 10:45
Forum: Models and estimation
Topic: Person attributes in unlabelled choices
Replies: 7
Views: 10054

Re: Person attributes in unlabelled choices

Hi, you are right, I got mixed up in the post. Currently i have "(beta_S2 + beta_S2_MM * S2MM) * S2==2" in my code. I am very sorry for the confusion! And yes, i would like to quantify any interaction effects between S2 and the corresponding individual maturity perception for that attribut...
by Sutsch
16 Jan 2022, 20:42
Forum: Models and estimation
Topic: Person attributes in unlabelled choices
Replies: 7
Views: 10054

Re: Person attributes in unlabelled choices

Hi Stephane, again: Thank you very much for your quick reply! That helps a lot. My base attributes and the corresponding attribute level are: 1. Price calculation (P): fix, temporal variable, consumption variable (coding 1 to 3) 2. Communication: (A): Mail, e-mail, online portal, messaging service v...
by Sutsch
16 Jan 2022, 00:07
Forum: Models and estimation
Topic: Person attributes in unlabelled choices
Replies: 7
Views: 10054

Person attributes in unlabelled choices

Hi together, I don't know if this is the right place to adress my issue, however, it seems close to the question of Anna (kind of). I have data from an unlabelled choice experiment with four attributes (e.g. service and interaction channels). Before taking the choice tasks I asked the respondents to...
by Sutsch
14 Jan 2022, 23:55
Forum: Errors during model validation and/or estimation.
Topic: Mixed Logit: ERROR: Singular Hessian, cannot calculate s.e.
Replies: 4
Views: 3924

Re: Mixed Logit: ERROR: Singular Hessian, cannot calculate s.e.

Hi Stephane, I updated Apollo and increased the mlhs draws to 100 and I got results that I have to investigate now (See below). So I guess my issue ist resolved. Thank you also for your concern regarding my attributes! I have 2 sets of binary attributes (A1/A2/A3 and S1/S2/S3) that have been present...
by Sutsch
14 Jan 2022, 16:26
Forum: Errors during model validation and/or estimation.
Topic: Mixed Logit: ERROR: Singular Hessian, cannot calculate s.e.
Replies: 4
Views: 3924

Re: Mixed Logit: ERROR: Singular Hessian, cannot calculate s.e.

Hi Stephane, thank you for your quick reply! below you'll find the results of the MNL (and in addition the code afterwards). I ll do the update tonight (What happened to: "never change a running system?"). :-) Thank you in advance for your help! Greetings Sutsch Results MNL################...
by Sutsch
14 Jan 2022, 09:29
Forum: Errors during model validation and/or estimation.
Topic: Mixed Logit: ERROR: Singular Hessian, cannot calculate s.e.
Replies: 4
Views: 3924

Mixed Logit: ERROR: Singular Hessian, cannot calculate s.e.

Hi everyone, I want to estimate a mixed logit model that is very close to the (old) examplaes from the Apollo Homepage (Apollo Example 14: Mixed logit model on Swiss route choice data, uncorrelated Lognormals in utility space). The model (with my parameter) converges, however, while computing the co...
by Sutsch
17 Sep 2021, 16:40
Forum: Post-estimation analysis/use of results
Topic: Test for difference, split sample MNL, Poe test
Replies: 4
Views: 4734

Re: Test for difference, split sample MNL, Poe test

Dear Stephane,

thank you very much for your answer and the clarification! That helps! I will look into apollo_deltaMethod, try to apply it and get back at you with my expericences or (hopefully no) questions!

Thank you!

Best wishes
Sutsch
by Sutsch
15 Sep 2021, 20:10
Forum: Post-estimation analysis/use of results
Topic: Test for difference, split sample MNL, Poe test
Replies: 4
Views: 4734

Test for difference, split sample MNL, Poe test

Hi everyone, I am rather new to R and Apollo, however, based on your examples I managed to got an MNL estimation for my data set running. I did a split sample approach and for each sample I estimated the parameters. Now I wanted to see, if my estimations for the attributes differ significantly betwe...

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