How common is the ‘prominence effect’? Additional evidence to Whynes et al.
通过多个条件价值评估研究的数据，检验了人们在支付意愿调查中倾向于选择突出数值（如1、2、5、10等）的“突出效应”是否普遍，发现该效应虽存在但未达到统计显著性。
In a recent issue of Health Economics Letters, Whynes et al. report an observation not previously reported in the willingness-to-pay (WTP) literature; that when people are asked to provide an estimate using payment scales they tend to disproportionately select prominent values (that is, 1, 2, 5, 10, 20, 50, 100, etc.). However, it remains an open question just how common this prominence effect actually is. Here we present data from several additional contingent valuation (CV) studies, which suggest that although prominence occurs, it does not reach statistical significance, as found by Whynes et al. A number of reasons are outlined to explain this.