base-case-scenario for sensitivity analysis

Question

Dear community,

i am assessing a cbc study of 330 participants, having  8 attributes with 3-5 levels, 10 random & 3 fixed holdout tasks with 4 concepts + none option.

After chosing my model I want to conduct a sensitivity analysis in my master thesis.  As  number of products for the base-case-scenario were not specified I am wondering how many products I should include.

Should I  use 4 products (equals the number of level for attribute  "brand"and the amount of concepts the participant had to decide from)?

Thank you in advance,

botmar

Answer 1

Keeping the number of brands to equal the number of products in the base case seems like a reasonable choice.   Also, using a number of alternatives that's the same as the number in your designed choice sets seems like another easily defensible  choice.