Think of a number...any number?
分析了3000多人对支付意愿的回答，发现多数人只从有限范围内选了少数几个“突出数字”，表明在难以精确估值时存在假设性偏差。
An examination of the willingness to pay values elicited from more than 3000 persons involved in three independent studies revealed that the majority had offered one of a limited number of values from the ranges available to them. These values were 'prominent numbers', the use of which has been observed previously in circumstances where subjects feel that precise estimates of value are either difficult to make, or are not worth making. The existence of widespread prominence in response is suggestive of hypothetical bias in contingent valuation.