Dear David ,
Thanks the clarification and suggestion to estimate the means. I will see if I have luck with that.
Kind regards
Valeria Toledo
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
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Search found 10 matches
- 11 May 2021, 09:15
- Forum: Post-estimation analysis/use of results
- Topic: estimating conditional medianWTP with a lognormal-cost estimates
- Replies: 2
- Views: 4653
- 07 May 2021, 11:12
- Forum: Post-estimation analysis/use of results
- Topic: estimation of median conditional with apollo_conditionals()
- Replies: 1
- Views: 3816
estimation of median conditional with apollo_conditionals()
Hi I am using a MXL model with lognormal cost. I would like to be able to extract the median of the lognormal distribution of the cost parameter. Is it possible to change the source code or add something into the function "apollo_conditionals()" so that it provides the conditional median (...
- 29 Apr 2021, 10:49
- Forum: Post-estimation analysis/use of results
- Topic: estimating conditional medianWTP with a lognormal-cost estimates
- Replies: 2
- Views: 4653
estimating conditional medianWTP with a lognormal-cost estimates
Hi I am estimating a model with lognormal cost and want to use the preference of space. 1. First I estimated the same model in preference of space and WTP space to compare the estimates. I assumed a lognormal distribution for cot: randcoeff[["log_cost" ]] =-exp(mu_log_cost + sigma_log_cost...
- 28 Aug 2020, 12:45
- Forum: Model specification
- Topic: specification or startting values issues?
- Replies: 5
- Views: 7269
Re: specification or startting values issues?
Hi David, this is the code for the second one. Thanks for loking into it, setwd("C:/Users/vt8/University of Stirling/Keila Meginnis - R-Valeria_Shared") setwd("C:/Users/im_ba/University of Stirling/Keila Meginnis - R-Valeria_Shared") # ############################################...
- 26 Aug 2020, 13:08
- Forum: Model specification
- Topic: specification or startting values issues?
- Replies: 5
- Views: 7269
Re: specification or startting values issues?
Hi David, sorry to bother you again 1.I tried the suggestion you made above (removing the LV from the utility equation of one alternative) and got the same error. 2. I also tried running the simplest model (LVS are only interacted with ASC) and still getting same error What intrigues me the most, is...
- 24 Aug 2020, 11:03
- Forum: Model estimation
- Topic: Number of thresholds to use in hybrid ordered model with no data in one level
- Replies: 5
- Views: 8846
Re: Number of thresholds to use in hybrid ordered model with no data in one level
Hi David, that worked perfectly.
Thanks a lot for your time and help, I really appreciate it.
Best
Valeria Toledo
Thanks a lot for your time and help, I really appreciate it.
Best
Valeria Toledo
- 22 Aug 2020, 11:50
- Forum: Model estimation
- Topic: Number of thresholds to use in hybrid ordered model with no data in one level
- Replies: 5
- Views: 8846
Re: Number of thresholds to use in hybrid ordered model with no data in one level
Hi David, thanks a lot your time and suggestions. My data has a numeric format, so I tried the coding option as you first suggested (skipping level 2). Now I am getting a new error: "Testing probability function (apollo_probabilities) Error in apollo_ol(ol_settings1, functionality) : Threshold ...
- 22 Aug 2020, 11:13
- Forum: Model estimation
- Topic: Number of thresholds to use in hybrid ordered model with no data in one level
- Replies: 5
- Views: 8846
Re: Number of thresholds to use in hybrid ordered model with no data in one level
Hi David,
I saw the coding option from another comment but it didn't occur to me to use it like that. This solution makes the coding much clearer.
Thanks a lot for your reply!
I saw the coding option from another comment but it didn't occur to me to use it like that. This solution makes the coding much clearer.
Thanks a lot for your reply!
- 21 Aug 2020, 10:58
- Forum: Model specification
- Topic: specification or startting values issues?
- Replies: 5
- Views: 7269
specification or startting values issues?
Hi I have been trying to build a hybrid model with a new dataset. I have successfully run a hybrid with other data and kind of followed my previous code but something is going wrong. I am posting the "more complex model" for which I am getting INF and NA in the output. At first I though it...
- 20 Aug 2020, 15:56
- Forum: Model estimation
- Topic: Number of thresholds to use in hybrid ordered model with no data in one level
- Replies: 5
- Views: 8846
Number of thresholds to use in hybrid ordered model with no data in one level
Hi, I am trying to estimate a hybrid model with ordered indicators. I have succesfully run this type of model with other datasets previously succesfully, but I have encounter a problem with the current dataset I am using. I have a variable with the following levels levels=c(1,2,3,4,5),labels=c("...