Dear Mr. Denham, thank you so much for your answer. My data input table looks like this: N RespID Set Alt Choice None Product Red Blue Small Large Price 1 3 121 1 0 0 481 1 0 1 0 200 1 3 121 2 1 0 482 1 0 0 1 300 1 3 121 3 0 0 483 0 1 1 0 400 1 3 121 4 0 0 484 0 1 0 1 200 1 3 121 5 0 1 0 0 0 0 0 So e.g. Respondent "3" sees 5 alternatives in Choice Set "121" where alternative 5 is the no choice option (Choice Based Conjoint). As already said, the attribute levels are dummy coded: 1 if the level is present, 0 if not. The price is linear and can be directly copied into the choice set coding. In this example, respondent "3" chooses the second alternative in the choice set. This alternative is "Red" and "Large" at a price of 300. As you can see, there actual attributes (color and size) are not included in the coding. So how would you proceed in this case? Thank you very much for your help. Best, Alex
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