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条件价值评估:在孟加拉国为儿童和成人因疫苗可预防疾病而降低死亡率的意愿支付意愿的初步研究。

Contingent Valuation: A Pilot Study for Eliciting Willingness to Pay for a Reduction in Mortality From Vaccine-Preventable Illnesses for Children and Adults in Bangladesh.

机构信息

International Vaccine Access Center, Johns Hopkins Bloomberg School of Public Health, Department of Internaional Health, Baltimore, MD, USA.

International Vaccine Access Center, Johns Hopkins Bloomberg School of Public Health, Department of Internaional Health, Baltimore, MD, USA.

出版信息

Value Health Reg Issues. 2021 May;24:67-76. doi: 10.1016/j.vhri.2020.10.004. Epub 2021 Jan 25.

Abstract

OBJECTIVES

The contingent valuation (CV) method elicits willingness to pay (WTP) for calculating the value of statistical life (VSL). CV approaches for assessing VSL are uncommon in many low and middle-income countries (LMICs). Between 2008 and 2018 only 44 articles utilized WTP in a health-related field and of these only 5 (11%) utilized CV to assess the WTP for a mortality risk reduction. We elicit WTP estimates and compute VSL using the CV method in Bangladesh.

METHODS

The pilot study was primarily aimed at developing best practice guidelines for CV studies in LMICs to get more robust WTP estimates. To this end, we explored three methodological a) Varying the name of the intervention, keeping all other characteristics constant; b) varying the effectiveness of the health intervention and c) offering an overnight period to think about the WTP scenario. The survey was administered 413 randomly selected participants. VSL was for a 1/3000 mortality risk reduction.

RESULTS

We had more males (54%) than females (46%) and the mean annual self-reported income was $5,683.36. Mean VSL is $11,339.70 with a median of $10,413. The ratio of child: adult WTP is approximately 1 by both gender and age category. The vaccine intervention had the largest amount of $0 WTP and protest responses (52% and 58% respectively). 93% of the participants were able to describe (teach-back) the vaccine effectiveness using their own family as an example.

CONCLUSION

Our study provides empirical evidence on how to better generate CV surveys to produce more robust WTP estimates.

摘要

目的

条件价值评估(CV)方法通过意愿支付(WTP)来计算统计生命价值(VSL)。在许多低收入和中等收入国家(LMICs)中,评估 VSL 的 CV 方法并不常见。在 2008 年至 2018 年期间,只有 44 篇文章在健康相关领域使用了 WTP,其中只有 5 篇(11%)使用 CV 评估了对降低死亡率风险的 WTP。我们在孟加拉国使用 CV 方法得出 WTP 估计值并计算 VSL。

方法

该试点研究主要旨在为 LMIC 中的 CV 研究制定最佳实践指南,以获得更可靠的 WTP 估计值。为此,我们探索了三种方法:a)改变干预措施的名称,保持其他所有特征不变;b)改变健康干预措施的效果;c)提供一个晚上的时间来思考 WTP 情况。调查共对 413 名随机选择的参与者进行了调查。VSL 是为了降低 1/3000 的死亡率风险。

结果

我们的参与者中男性(54%)多于女性(46%),平均年收入为 5683.36 美元。平均 VSL 为 11339.70 美元,中位数为 10413 美元。按性别和年龄类别计算,儿童与成人的 WTP 比值约为 1。疫苗干预措施的 WTP 金额和抗议反应最大(分别为 52%和 58%)。93%的参与者能够用自己的家庭为例描述(回述)疫苗的有效性。

结论

我们的研究提供了关于如何更好地进行 CV 调查以产生更可靠的 WTP 估计值的经验证据。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/23e2/8163603/c0753471906e/gr1.jpg

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