Scope Issue in Contingent Valuation Studies of the COVID-19 Vaccine: The Case of China.
Scope Issue in Contingent Valuation Studies of the COVID-19 Vaccine: The Case of China.
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DOI：
10.1007/s40258-021-00706-9
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发表时间：
2022-05
影响因子：
3.6
通讯作者：
Ma Z
中科院分区：
文献类型：
--
作者：
Xiao J;Wu Y;Wang M;Ma Z
通过条件价值法评估公众对2019冠状病毒病疫苗的支付意愿（WTP），可以为政府定价提供相关依据。然而，CV方法的范围问题会严重影响估计结果的有效性和可靠性。考察受访者对COVID-19疫苗的支付意愿是否存在范围问题，并进一步验证CV估计结果的有效性和可靠性。在这项研究中，使用基于疫苗属性的正交实验设计，设计了9种不同的CV双界二分选择（DBDC）假设COVID-19疫苗场景。本研究收集了中国大陆31个省份的2450个样本，分别采用logistic、正态、对数logistic和对数正态参数模型对这9种情景下的公众支付意愿进行了独立估计。在此基础上，设计了几个外部范围测试来验证CV估计结果的有效性和可靠性。在20对COVID-19疫苗场景中，6对场景被归类为阴性范围问题，因此未通过外部范围测试。在剩下的14对场景中，只有4对场景完全通过了外部范围测试，1对场景部分通过了外部范围测试。发现了重大的负面范围和范围不敏感问题。在动态大流行环境的背景下，本研究的结果显示，CV方法可能难以有效估计受访者对COVID-19疫苗的支付意愿。我们建议未来的研究在应用CV方法估计公众对COVID-19疫苗的支付意愿时要谨慎。在线版本包含补充材料，可通过10.1007/s40258-021-00706-9获得。
Assessing the public’s willingness to pay (WTP) for the coronavirus disease 2019 (COVID-19) vaccine by the contingent valuation (CV) method can provide a relevant basis for government pricing. However, the scope issue of the CV method can seriously affect the validity and reliability of the estimation results. To examine whether there are scope issues in respondents’ WTP for the COVID-19 vaccine and to further verify the validity and reliability of the CV estimate results. In this study, nine different CV double-bounded dichotomous choices (DBDC) hypothetical COVID-19 vaccine scenarios were designed using an orthogonal experimental design based on the vaccine’s attributes. A total of 2450 samples from 31 provinces in Mainland China were collected to independently estimate the public’s WTP in these nine scenarios with logistic, normal, log-logistic and log-normal parameter models. Based on this estimation, several external scope tests were designed to verify the validity and reliability of the CV estimate results. In the 20 pairs of COVID-19 vaccine scenarios, 6 pairs of scenarios were classified as negative scope issues, therefore not passing the external scope test. Of the remaining 14 pairs of scenarios, only four pairs of scenarios completely passed the external scope test, and one pair of scenarios partially passed the external scope test. Significant negative scope and scope insensitivity issues were revealed. In the context of a dynamic pandemic environment, the findings of this study reveal that the CV method may face difficulty in effectively estimating respondents’ WTP for the COVID-19 vaccine. We suggest that future studies be cautious in applying the CV method to estimate the public’s WTP for the COVID-19 vaccine. The online version contains supplementary material available at 10.1007/s40258-021-00706-9.
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DOI：
10.1017/s026646230808063x
发表时间：
2008-09-01
影响因子：
3.2
作者：
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通讯作者：
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影响因子：
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