We assess the reliability and validity of estimates of the Value per Statistical Life (VSL) from contingent valuation by administering the same contingent valuation (CV) questionnaire on samples drawn from the population of the Czech Republic five years apart. We use a novel approach in eliciting the WTP for cancer mortality risk reduction, in that we present respondents with two probabilities—that of getting cancer, and that of surviving it. We find that the cancer VSL is somewhat different across the two samples, but this difference is completely explained by income and cancer dread. The WTP is proportional to the size of the cancer mortality risk reduction, and increases with income and with cancer dread. The income elasticity of the VSL is 0.5 to 0.7, and is thus in line with the findings in Masterman and Viscusi (2018). Our estimates of the VSL (approximately €3–4 mill. May 2019 PPP euro) are close to Viscusi and Masterman’s prediction (2017) based on compensating wage studies, less than the estimates from compensating wage studies conducted in the Czech Republic, and similar to estimates from other stated preference studies in the Czech Republic. We conclude that the CV questionnaire and administration procedures produce reliable and stable results, and that construct and criterion validity are likewise good. We interpret these findings as providing support for an approach that expresses very small mortality risks and risk reductions as the product of two probabilities.

我们通过对从相隔五年的捷克共和国人口中抽取的样本进行相同的条件估值 (CV) 调查问卷来评估条件估值中每个统计生命价值 (VSL) 估计值的可靠性和有效性。我们使用一种新颖的方法来引出降低癌症死亡风险的支付意愿，因为我们向受访者提供了两个概率——得癌症和幸存的概率。我们发现两个样本的癌症 VSL 有所不同，但这种差异完全可以由收入和癌症恐惧来解释。WTP 与癌症死亡风险降低的规模成正比，并随着收入和癌症恐惧而增加。VSL 的收入弹性为 0.5 到 0.7，因此与 Masterman 和 Viscusi (2018) 的研究结果一致。我们对 VSL 的估计（约 3-4 欧元。2019 年 5 月 PPP 欧元）接近 Viscusi 和 Masterman 基于补偿工资研究的预测（2017 年），低于在捷克共和国进行的补偿工资研究的估计，以及类似的来自捷克共和国其他陈述偏好研究的估计。我们得出的结论是，简历问卷和管理程序产生了可靠和稳定的结果，并且结构效度和标准效度同样良好。我们将这些发现解释为支持一种将非常小的死亡风险和风险降低表示为两个概率的乘积的方法。