Dear Stephane, Dear David,
I have a data set from a stated experiment in which each respondent answered 4 choice tasks. Now, I want to estimate a latent class model, and my question is whether I need to take into account the panel effect of the multiple answers by the same respondent. In the ...
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Search found 19 matches
- 12 Dec 2024, 07:27
- Forum: Model specification
- Topic: panel data for latent class model
- Replies: 5
- Views: 41211
- 01 Dec 2023, 16:27
- Forum: Model specification
- Topic: mixed logit query
- Replies: 14
- Views: 415253
Re: mixed logit query
Hi Stephane,
Thank you for your quick response.
your second model allows for differences in cost sensitivity between men and women, so it's quite normal that you would get differences in the WTP. Does that not make sense to you?
Indeed, since I allow for differences in cost, I get different ...
Thank you for your quick response.
your second model allows for differences in cost sensitivity between men and women, so it's quite normal that you would get differences in the WTP. Does that not make sense to you?
Indeed, since I allow for differences in cost, I get different ...
- 01 Dec 2023, 14:39
- Forum: Model specification
- Topic: mixed logit query
- Replies: 14
- Views: 415253
Re: mixed logit query
Dear Stephane,
I have calculated two models, model A : ten random coefficients, model B : ten random coefficients and I have allowed for differences between genders in the cost coefficient
randcoeff[["b_cost"]] = -exp( mu_log_b_cost + sigma_log_b_cost * draws_cost + (gender == 1) * ( mu_male_cost ...
I have calculated two models, model A : ten random coefficients, model B : ten random coefficients and I have allowed for differences between genders in the cost coefficient
randcoeff[["b_cost"]] = -exp( mu_log_b_cost + sigma_log_b_cost * draws_cost + (gender == 1) * ( mu_male_cost ...
- 29 Nov 2023, 12:32
- Forum: Model specification
- Topic: mixed logit query
- Replies: 14
- Views: 415253
Re: mixed logit query
Dear Stephane,
One additional question related to the previous one.
When I use a single random coefficient allowing for differences between men and women, there is a higher sd error for the attributes e.g.
> (mean(wtp_unit)); (sd(wtp_unit))
[1] 12.42137
[1] 587.157
while when I do not allow for ...
One additional question related to the previous one.
When I use a single random coefficient allowing for differences between men and women, there is a higher sd error for the attributes e.g.
> (mean(wtp_unit)); (sd(wtp_unit))
[1] 12.42137
[1] 587.157
while when I do not allow for ...
- 09 Nov 2023, 17:21
- Forum: Model specification
- Topic: mixed logit query
- Replies: 14
- Views: 415253
Re: mixed logit query
Dear Stephane,
Thank you for your recommendation.
I created a single random coefficient you suggested.
randcoeff[["b_cost"]] = -exp( mu_log_b_cost + sigma_log_b_cost * draws_cost + (gender == 1) * ( mu_male_cost + sigma_male_cost * draws_male_cost))
Now, I am trying to get the full distribution ...
Thank you for your recommendation.
I created a single random coefficient you suggested.
randcoeff[["b_cost"]] = -exp( mu_log_b_cost + sigma_log_b_cost * draws_cost + (gender == 1) * ( mu_male_cost + sigma_male_cost * draws_male_cost))
Now, I am trying to get the full distribution ...
- 13 Oct 2023, 13:19
- Forum: Model specification
- Topic: mixed logit query
- Replies: 14
- Views: 415253
Re: mixed logit query
Hi Stephane,
This helped. thank you.
Here is the code when I include the interactions in the random coefficient, I get NA
# ################################################################# #
#### LOAD LIBRARY AND DEFINE CORE SETTINGS ...
This helped. thank you.
Here is the code when I include the interactions in the random coefficient, I get NA
# ################################################################# #
#### LOAD LIBRARY AND DEFINE CORE SETTINGS ...
- 12 Oct 2023, 13:51
- Forum: Model specification
- Topic: mixed logit query
- Replies: 14
- Views: 415253
Re: mixed logit query
Hi Stephane,
Thank you for the suggestions.
One point for the negative sign. If I do not use it, then my wtp is negative. is this correct?
Regarding the cost_male I am getting something like this
[1] 1.504081e+18
[1] 3.999951e+20
Does this make sense?
Also, when I include the interactions in ...
Thank you for the suggestions.
One point for the negative sign. If I do not use it, then my wtp is negative. is this correct?
Regarding the cost_male I am getting something like this
[1] 1.504081e+18
[1] 3.999951e+20
Does this make sense?
Also, when I include the interactions in ...
- 27 Sep 2023, 06:13
- Forum: Model specification
- Topic: How to define the start value of mu and sigma when adding random parameters to the mixed logit model?
- Replies: 12
- Views: 173123
Re: How to define the start value of mu and sigma when adding random parameters to the mixed logit model?
Hello David, Hello Zhao,
I am running a mixed logit model in wtp space with negative lognormal for the price, while for the rest random coefficients, I use the normal distribution. However, the starting value for price (I use the values from the mnl model) doesn't work since the model produces NA ...
I am running a mixed logit model in wtp space with negative lognormal for the price, while for the rest random coefficients, I use the normal distribution. However, the starting value for price (I use the values from the mnl model) doesn't work since the model produces NA ...
- 19 Sep 2023, 14:12
- Forum: Model specification
- Topic: mixed logit query
- Replies: 14
- Views: 415253
Re: mixed logit query
Hi Stephane,
Thank you.
I first calculate the unconditional and then estimate the wtp separately for each random coefficient by the cost. I also use a negative sign since I use negative lognormal distribution for the cost. is this correct?
Here is the code I use.
##uncoditionals
unconditionals ...
Thank you.
I first calculate the unconditional and then estimate the wtp separately for each random coefficient by the cost. I also use a negative sign since I use negative lognormal distribution for the cost. is this correct?
Here is the code I use.
##uncoditionals
unconditionals ...
- 18 Sep 2023, 10:47
- Forum: Model specification
- Topic: mixed logit query
- Replies: 14
- Views: 415253
mixed logit query
Dear Stephane, Dear David,
Thank you!
I'm not sure if I need to create a new post or if I could ask here. sorry.
I also want to run a mixed logit model for the dutch sample.
The aim of my analysis is to investigate wtp for different functionalities on bicycles.
I found some deterministic ...
Thank you!
I'm not sure if I need to create a new post or if I could ask here. sorry.
I also want to run a mixed logit model for the dutch sample.
The aim of my analysis is to investigate wtp for different functionalities on bicycles.
I found some deterministic ...