My CBC consists out of 4 Attributes. Attribute 1 (landscape types) has 5 levels, whereas Attributes 2 (wind), 3 (pv), and 4 (powerlines) are converted to linear Attributes. I also integrated an interaction effect of Attribute A1 and A2. Lets assume that everything is significant. The aggregate Logit results show me following effects (e.g):
Interaction: A1.level1 x A2: +0,4
It is shown, that although A1.level1 and A2 show negative effect on the utility, the interaction of both provide positive values. How is that possible and how to deal with it?
Thanks four your support!