Ordering effect and price sensitivity in discrete choice experiments: need we worry?
通过银屑病患者治疗偏好实验，发现价格属性放在描述末尾时患者价格敏感性显著提高，表明偏好受情境影响且存在启发式决策，但顺序效应并非词典式排序的表现。
The objective of this paper is to analyse the impact that attribute ordering has on the relative importance of the price attribute. A discrete choice experiment was performed in order to elicit psoriasis patients' preferences for treatment. We tested for ordering effect with respect to the price attribute, and disclosed noticeable higher price sensitivity when the price attribute was placed at the end of the program description. Our results indicate that preferences are context dependent and that heuristics may be used in the choice process. Our result does not, however, suggest that ordering effect is a symptom of lexicographic ordering.