BookmarkSubscribeRSS Feed
🔒 This topic is solved and locked. Need further help from the community? Please sign in and ask a new question.
ReneH
Calcite | Level 5

To analyze a choice based conjoint (discrete choice) experiment I've used the phreg procedure as explained by Warren Kuhfeld in his book "Marketing Research in SAS".

 

One of our partners in a recent study used hierachical Bayes regression and sent us a dataset with individual part-worth utilities. The dataset showed us that there was one level of an attribute that was 'loved' by half of the respondents but the other half 'hated' the level. From the results I get from phreg I conclude that the parth-worth utility for this level is very low, which is actually a wrong conclusion given the individual part-worth utilities.

 

With the bchoice procedure I was able to estimate the part-worth utilities with hierarchical Bayes regression. The results are similar to the phreg procedure, but I did not found a way to generate individual part-worth utilities. 

 

Is there a way to generate individual part-worth utilities with SAS?

1 ACCEPTED SOLUTION

Accepted Solutions
amyshi
SAS Employee

Yes, you can fit a hierarchical Bayesian model in BCHOICE to obtain individual part worth utilities, by adding the RANDOM statement.

You can find the newest documentation for PROC BCHOICE http://support.sas.com/documentation/onlinedoc/stat/142/bchoice.pdf

on SAS/STAT 14.2, where we have added MaxDiff and allocation types of choice model into the BCHOICE procedure. 

 

There are examples provided in the documentation, in both the ‘Getting Started’ and ‘Examples’ sections. If you want, I can send you the SAS code for all the examples.

 

In Example 27.4, there is outpost=Postsamp specified in the proc level statement right after data=Trashcan, which requests to output a new SAS data set containing the posterior draws for all the random-effects including the subject-level random effects (individual part worths).

View solution in original post

1 REPLY 1
amyshi
SAS Employee

Yes, you can fit a hierarchical Bayesian model in BCHOICE to obtain individual part worth utilities, by adding the RANDOM statement.

You can find the newest documentation for PROC BCHOICE http://support.sas.com/documentation/onlinedoc/stat/142/bchoice.pdf

on SAS/STAT 14.2, where we have added MaxDiff and allocation types of choice model into the BCHOICE procedure. 

 

There are examples provided in the documentation, in both the ‘Getting Started’ and ‘Examples’ sections. If you want, I can send you the SAS code for all the examples.

 

In Example 27.4, there is outpost=Postsamp specified in the proc level statement right after data=Trashcan, which requests to output a new SAS data set containing the posterior draws for all the random-effects including the subject-level random effects (individual part worths).

SAS Innovate 2025: Save the Date

 SAS Innovate 2025 is scheduled for May 6-9 in Orlando, FL. Sign up to be first to learn about the agenda and registration!

Save the date!

What is ANOVA?

ANOVA, or Analysis Of Variance, is used to compare the averages or means of two or more populations to better understand how they differ. Watch this tutorial for more.

Find more tutorials on the SAS Users YouTube channel.

Discussion stats
  • 1 reply
  • 1676 views
  • 0 likes
  • 2 in conversation