We want to calculate the WTP for quality features for different positioned brands. For this we use the conditional cbc/hb design you see below.
Our problem is, that we derive for all three Brandposition levels the same price function.
- Brandposition: Premium, Standard, NoName
- Quality feature: a,b,c
- Preis: -20%, avg, +20% (conditional for each Brand level)
What are we doing wrong? Do we have to add a price-brand interaction in the CBC utility estimation interface?!
We use SSI version 8.4.8, cbc/hb and SMRT.
Many thanks in advance for your help!!!