Discrete choice experiments (DCEs) are used to provide evidence for policymaking and nonmarket valuation in health. A perennial issue with the stated preference data used in DCEs is hypothetical bias; that is, hypothetical responses in experiments may differ from real-world behavior. A randomized DCE tested whether an incentive-compatible preference elicitation reduced hypothetical bias. Adult smokers were randomly assigned to either an incentive-compatible arm or a control arm; and then made DCE choices among cigarettes, e-cigarettes, and an opt-out. We examined the impacts on product choices, willingness to pay, and the scale of utility. Scale and willingness to pay were unaffected by the incentive. Respondents in the incentive-compatible arm were more likely to choose e-cigarettes. That is, the incentive-compatible approach affected product choices rather than scale/attribute preferences. Thus, while it is feasible to use incentive-compatibility mechanisms to manipulate experimental behaviors, the approach did not induce the hypothesized effect on preferences in this setting.

离散选择实验（DCE）用于为卫生方面的决策和非市场评估提供证据。DCE中使用的陈述的偏好数据常年存在的问题是假设偏差。也就是说，实验中的假设反应可能与实际行为不同。随机DCE测试了激励兼容的偏好引发是否减少了假设的偏见。成年吸烟者被随机分配到激励兼容组或对照组。然后在卷烟，电子烟和选择退出中选择DCE。我们研究了对产品选择，付款意愿和效用规模的影响。规模和支付意愿不受激励措施的影响。激励兼容部门中的受访者更有可能选择电子烟。那是，激励兼容的方法影响产品选择，而不是规模/属性偏好。因此，尽管使用激励兼容机制来操纵实验行为是可行的，但这种方法并未在这种情况下对偏好产生任何假设影响。