在离散选择实验中,用离散成本和随机系数计算支付意愿
Clarence Ong1, Alex R Cook1, Ker-Kan Tan1,2
1Saw Swee Hock School of Public Health, National University of Singapore and National University Health System, Singapore, Singapore.
Health economics review
|July 18, 2025
概括
准确计算支付意愿 (WTP) 需要离散选择实验来计算离散成本,而不仅仅是连续成本. 这种方法可以避免在不同的成本水平上高估或低估WTP.
科学领域:
- 卫生经济学 卫生经济学
- 行为经济学是一种行为经济学.
- 计量经济学 计量经济学
背景情况:
- 支付意愿 (WTP) 是经济评估中的一个关键指标.
- 离散选择实验 (DCE) 被广泛用于引起WTP.
- 传统的DCE模型通常假定连续成本,这可能会误导离散成本.
研究的目的:
- 为在具有离散成本的DCE中计算WTP提供指导.
- 突出线性成本不实用性假设的局限性.
- 提出和展示准确的WTP估计方法,以离散的成本.
主要方法:
- 使用了五种混合逻辑模型.
- 对于成本参数,使用了日志正常分布.
- 为离散成本WTP计算,开发了一种零碎的线性实用函数.
- 进行了个人级别的模拟,以比较中位数和平均WTP.
- 一个关于结直肠癌查偏好的案例研究被用于演示.
主要成果:
- 与连续模型相比,离散成本模型在低成本时显示出更高的不实用性,在高成本时显示出更低的不实用性.
- 连续成本模型倾向于在低成本时高估WTP,在高成本时低估.
- 二次性成本条款只提供了部分改善,无法捕捉急剧的偏好变化.
- 在连续和离散成本模型之间,政策建议有所不同.
结论:
- 准确的WTP导出需要将离散成本纳入DCE中.
- 适当的成本参数分布假设对于精确的WTP估计至关重要.
- 选择成本表示方式显著影响WTP的结果和政策影响.
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