Testing hypothetical bias with a real choice experiment using respondents' own money
在超市中通过三种处理（假设、假设加廉价谈话、真实）的选择实验，要求真实处理组用自己钱支付，发现假设偏差存在且廉价谈话脚本效果不一。
The investigation of hypothetical bias in choice experiments (CEs) has typically been \nconducted in the laboratory with only minimal field experiments. Moreover, it is \ncommon practice to provide an initial endowment (money or coupons) to respondents. \nIn this research, we employed a between-subject CE in a supermarket with three different treatments (i.e. hypothetical, hypothetical with cheap talk script and real). With the \n‘real’ treatment, we required respondents to use their own money when making a \npayment. The proposed incentive-compatible mechanism mimics as close as possible \nthe everyday purchasing situation. Results confirm the presence of hypothetical bias \nand the mixed effectiveness of a cheap talk script