ApolloChoiceModelling forum

Thank you so much for your help Stephane!

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 use t...

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("datab...

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 &quo...

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 I us...

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. However, it h...

Thank you Stephane! The log-likelihood function reached earlier the point of convergation but the received (WTP) parameters were near identical than I get with 0 starting values. I don't understand how I get so different results by using deltha method and WTP-space. with 0.01 starting values for pri...

Hi Stephane,

I used 0 starting value for every parameters, both in preference- and WTP-space estimation.

Peter

- Results of two-class LC model (in preference space) Model diagnosis : successful convergence Number of individuals : 261 Number of observations : 2088 Number of cores used : 3 Model without mixing LL(start) : -2293.902 LL(0) : -2293.902 LL(final, whole model) : -2043.342 LL(component_1) : -2735.63...

Hi Stephane! I have a question about WTP-space estimates in latent class context. I think that, in terms of MNL and LC models I have to get exactly the same results for WTP-s (regardless of using WTP-space or computing with Deltha method). However, now I testing a stated choice database (It is not t...