A general treatment of 'don't know' responses from choice experiments
提出一种模型，用选项间的相似性熵度量来解释受访者在选择实验中为何选择‘不知道’，并应用于食品营养成分偏好研究。
In this paper, a modelling approach is developed for the treatment of ‘don't know’(DK) responses, within choice experiments (CEs). A DK option is motivated by the need to allow respondents the opportunity to express uncertainty. Our model explains a DK using an entropy measure of the similarity between options given to respondents within the CE. We illustrate our model by applying it to a CE examining consumer preferences for nutrient contents in food. We find that similarity between options in a given choice set does explain the tendency for respondents to report DK.