Stated Attribute Non‐attendance in Successive Choice Experiments
研究了选择实验中受访者声称忽略某些属性对支付意愿估计的影响，提出一种收缩混合Logit模型，能更可靠地估计支付意愿，并发现连续实验中声称不关注的可靠性会提高。
Abstract Attribute non‐attendance in choice experiments affects willingness‐to‐pay (WTP) estimates and therefore the validity of the method. A recent strand of literature uses attenuated estimates of marginal utilities of ignored attributes. Following this approach, we propose a generalisation of the mixed logit model, whereby the distribution of marginal utility coefficients of a stated non‐attender has a potentially lower mean and lower variance than those of a stated attender. Model comparison shows that our shrinkage approach fits the data better and produces more reliable WTP estimates. We further find that while reliability of stated attribute non‐attendance increases in successive choice experiments, it does not increase when respondents report having ignored the same attribute twice.