Hi David,
Thank you very much for your reply and for your helpful suggestions.
Do you think that increasing the amount of RAM could solve the problem? If so, do you have any recommendation regarding how much RAM would be needed to run a model of this complexity reliably?
Thank you very much in ...
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 21 matches
- 03 Aug 2026, 11:55
- Forum: Model estimation
- Topic: Hardware requirements for complex hybrid latent class models in Apollo
- Replies: 5
- Views: 5406
- 02 Jun 2026, 11:40
- Forum: Model estimation
- Topic: Hardware requirements for complex hybrid latent class models in Apollo
- Replies: 5
- Views: 5406
Re: Hardware requirements for complex hybrid latent class models in Apollo
Hi Stephane!
Thank you very much for your quick reply.
I am trying to run the model with 500 MLHS draws. With this setting, I already receive the error message I mentioned earlier.
The 5-class latent class model on which this hybrid choice specification is based ran without any problems. Its main ...
Thank you very much for your quick reply.
I am trying to run the model with 500 MLHS draws. With this setting, I already receive the error message I mentioned earlier.
The 5-class latent class model on which this hybrid choice specification is based ran without any problems. Its main ...
- 29 May 2026, 22:34
- Forum: Model estimation
- Topic: Hardware requirements for complex hybrid latent class models in Apollo
- Replies: 5
- Views: 5406
Hardware requirements for complex hybrid latent class models in Apollo
Dear Apollo Team,
I am currently working with Apollo in the context of hybrid choice modelling, and I have encountered computational limitations when estimating a relatively complex model.
The model is based on a best-worst scaling / maxdiff choice experiment with approximately 6,400 respondents ...
I am currently working with Apollo in the context of hybrid choice modelling, and I have encountered computational limitations when estimating a relatively complex model.
The model is based on a best-worst scaling / maxdiff choice experiment with approximately 6,400 respondents ...
- 09 Apr 2025, 10:57
- Forum: Model specification
- Topic: Handling the dichotomous latent variable
- Replies: 3
- Views: 219692
Handling the dichotomous latent variable
Dear Apollo team!
I would like to ask you about a specific case of the hybrid choice model.
What should I do in case my latent variable is a categorical dichotomous variable?
I understand that the choice model part can be easily solved through an interaction, e.g:
b_price_new=b_price + lambda*LV ...
I would like to ask you about a specific case of the hybrid choice model.
What should I do in case my latent variable is a categorical dichotomous variable?
I understand that the choice model part can be easily solved through an interaction, e.g:
b_price_new=b_price + lambda*LV ...
- 08 Jul 2021, 09:39
- Forum: Post-estimation analysis/use of results
- Topic: Effect of latent variable in interaction
- Replies: 10
- Views: 58230
Re: Effect of latent variable in interaction
Thank you so much for your help Stephane!
- 07 Jul 2021, 18:27
- Forum: Post-estimation analysis/use of results
- Topic: Effect of latent variable in interaction
- Replies: 10
- Views: 58230
Re: Effect of latent variable in interaction
Hi Stephane,
thank you very much for your help!
I just tried to use the WTP-space transformation (it worked perfectly for the other models) in order to reach a consistent approach for all models analyzed (to avoid future criticism from reviewer).
Based on your suggestion, in this case I should ...
thank you very much for your help!
I just tried to use the WTP-space transformation (it worked perfectly for the other models) in order to reach a consistent approach for all models analyzed (to avoid future criticism from reviewer).
Based on your suggestion, in this case I should ...
- 05 Jul 2021, 14:34
- Forum: Post-estimation analysis/use of results
- Topic: Effect of latent variable in interaction
- Replies: 10
- Views: 58230
Re: Effect of latent variable in interaction
Hi Stephane,
I copy the code used to estimate the ICLV model.
rm(list = ls())
library(apollo)
apollo_initialise()
apollo_control = list(
modelName ="MLM_based_ICLV",
modelDescr ="MLM_based_ICLV",
indivID ="ID",
mixing = TRUE,
nCores = 4
)
database = read.csv("database.csv",header=TRUE ...
I copy the code used to estimate the ICLV model.
rm(list = ls())
library(apollo)
apollo_initialise()
apollo_control = list(
modelName ="MLM_based_ICLV",
modelDescr ="MLM_based_ICLV",
indivID ="ID",
mixing = TRUE,
nCores = 4
)
database = read.csv("database.csv",header=TRUE ...
- 05 Jul 2021, 07:25
- Forum: Post-estimation analysis/use of results
- Topic: Effect of latent variable in interaction
- Replies: 10
- Views: 58230
Re: Effect of latent variable in interaction
Hi Stephane!
Thank you for the quick and useful answer!
For solution one:
So, for example if I use WTP-space transformation (V_indication=b_indication+b_indication_shift_lambda*LV -> U=b_cost*(V_indication*Indication_alti +....), is it enough to interpret "b_indication" and ignore the "b ...
Thank you for the quick and useful answer!
For solution one:
So, for example if I use WTP-space transformation (V_indication=b_indication+b_indication_shift_lambda*LV -> U=b_cost*(V_indication*Indication_alti +....), is it enough to interpret "b_indication" and ignore the "b ...
- 04 Jul 2021, 16:14
- Forum: Post-estimation analysis/use of results
- Topic: Effect of latent variable in interaction
- Replies: 10
- Views: 58230
Effect of latent variable in interaction
Hi David and Stephane!
Unfortunately, I have a problem with interpreting my ICLV model results.
I would like to estimate the following structure: (1) MNL model, (2) MNL model with latent variable, (3) Mixed logit model, (4) Mixed logit model with latent variable.
I have one latent variable, and ...
Unfortunately, I have a problem with interpreting my ICLV model results.
I would like to estimate the following structure: (1) MNL model, (2) MNL model with latent variable, (3) Mixed logit model, (4) Mixed logit model with latent variable.
I have one latent variable, and ...
- 03 Feb 2021, 18:51
- Forum: Model estimation
- Topic: WTP-space estimates in latent class context
- Replies: 14
- Views: 84234
Re: WTP-space estimates in latent class context
Hi Stephane!
Thank you for your answers!
It became completely understandable to me.
I'm just trying to test and compare results in some model specifications.
To this point, I have found that (on other databases) in case of MNL and LC models, the two approaches were completely the same ...
Thank you for your answers!
It became completely understandable to me.
I'm just trying to test and compare results in some model specifications.
To this point, I have found that (on other databases) in case of MNL and LC models, the two approaches were completely the same ...