Abstract

The investigation of a decision maker’s systematic deviation from rational behavior (bias) is of growing interest in descriptively oriented decision-analysis. Some of this work also challenges assumptions in prescriptive decision theory, i. e. it might not be easy to elicit a uniquely defined correct multi-attribute utility or value function. We show a bias also exists in the assessment of attribute weights. Our main finding is that the weight assigned to an attribute tends to be smaller than the sum of the weights of the corresponding subattributes.

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