Jay
can you show us the output, please?
Thanks
Stephane
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- 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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- To update to the latest official version, just enter install.packages("apollo"). To update to a development version, download the appropriate binary file from http://www.ApolloChoiceModelling.com/code.html, and install the package from file
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Search found 1002 matches
- 01 May 2024, 11:39
- Forum: Model specification
- Topic: MNL for Case 1 BWS: saddle point convergence
- Replies: 1
- Views: 28
- 01 May 2024, 11:37
- Forum: Data preparation, processing and pre-estimation analysis
- Topic: Handling 'Not Available' Data
- Replies: 1
- Views: 24
Re: Handling 'Not Available' Data
Hi I would in your case recommend option 1. Even when I treat income as a continuous variable in my models, I do not exclude people with missing data, nor do I assign them to another category. Rather, I estimate a different parameter for them, which would be in line with your idea to treat it as cat...
- 01 May 2024, 11:35
- Forum: Model specification
- Topic: latent class model
- Replies: 4
- Views: 2757
Re: latent class model
Hi I don't have any such example files, but like I said, this would all be accommodated by moving the apollo_panelProd call to be after apollo_lc. It's a very simply change for you to make For the class allocation model, you could then include covariates that vary across observations in the class al...
- 30 Apr 2024, 14:03
- Forum: Model specification
- Topic: Order of parameters in apollo_beta (LC model)
- Replies: 1
- Views: 46
Re: Order of parameters in apollo_beta (LC model)
Paul
the order does not matter as they are indexed by name. So there must be another issue.
Did you compare the starting LL?
As an aside, I strongly suggesting using different starting values in the different classes
Stephane
the order does not matter as they are indexed by name. So there must be another issue.
Did you compare the starting LL?
As an aside, I strongly suggesting using different starting values in the different classes
Stephane
- 24 Apr 2024, 15:36
- Forum: Post-estimation analysis/use of results
- Topic: delta method to calculate WTP (normal and log-normal parameters)
- Replies: 10
- Views: 13770
Re: delta method to calculate WTP (normal and log-normal parameters)
yes, that's correct
- 24 Apr 2024, 15:35
- Forum: Estimation results
- Topic: Low t-ratios in MNL
- Replies: 1
- Views: 92
Re: Low t-ratios in MNL
Hi
there could be many reasons for this. Either there really is no effect (in which case that is a finding), or you don't have enough data, or a bad design. But this is a general question, not Apollo related
Stephane
there could be many reasons for this. Either there really is no effect (in which case that is a finding), or you don't have enough data, or a bad design. But this is a general question, not Apollo related
Stephane
- 24 Apr 2024, 15:33
- Forum: Data preparation, processing and pre-estimation analysis
- Topic: deal with Missing data
- Replies: 1
- Views: 78
Re: deal with Missing data
Hi
you can either impute them, or estimate a separate effect for those people
Stephane
you can either impute them, or estimate a separate effect for those people
Stephane
- 24 Apr 2024, 15:31
- Forum: Post-estimation analysis/use of results
- Topic: Marginal rate of substitution for different sociodemographic groups
- Replies: 3
- Views: 370
Re: Marginal rate of substitution for different sociodemographic groups
Hi
your unconditional distributions will not be different for people with different socio-demographics unless you have included the interactions in apollo_randCoeff. So subsetting the data will not do anything
Stephane
your unconditional distributions will not be different for people with different socio-demographics unless you have included the interactions in apollo_randCoeff. So subsetting the data will not do anything
Stephane
- 24 Apr 2024, 15:29
- Forum: Post-estimation analysis/use of results
- Topic: WTP for mixed logit with random parameters
- Replies: 24
- Views: 35010
Re: WTP for mixed logit with random parameters
Hi the delta method in Apollo is for individual model parameters, not for distributed coefficients. In your case, you would need to use apollo_unconditionals to obtain the draws for the coefficients and calculate WTP moments that way, but you would not be able to use apollo_deltaMethod as you cannot...
- 24 Apr 2024, 15:27
- Forum: Errors during model validation and/or estimation.
- Topic: error in getiing Standarad error of e mdcev model
- Replies: 3
- Views: 114
Re: error in getiing Standarad error of e mdcev model
Hi
it's not clear what you mean exactly. Do you want to interact this with covariates?
Stephane
it's not clear what you mean exactly. Do you want to interact this with covariates?
Stephane