We are setting up a multi-country conjoint (with 5 different segments per country). I would analyse the segments separately, since differences in target group and price are substantial.
But, I tend to analyze data from all countries together, at least if counts indicate it's allowed to do so. Country would then be tried as a covariate.
One complicating factor is that the base prices differ from one country to another. Not much but they do differ. The percentual price range is the same for all countries (+-20%). How can I deal with that? Is there a way to recode or normalize the summed price in the ACBC data to the country base price, so that we work with percentual price differences instead of the real prices?