Valuing the Environment Through Contingent Valuation
介绍了条件价值评估法在全球范围内评估交通、卫生、健康、教育等公共物品（包括环境）的应用，并讨论了如何通过抽样、问卷设计和数据分析提高调查可靠性，以及该方法如何揭示非市场商品的潜在需求曲线。
Contingent valuation is now used around the world to value many types of public goods, including transportation, sanitation, health, and education, as well as the environment. The author describes how researchers go about making such surveys reliable, mentioning recent innovations in sampling, questionnaire design, and data analysis, including formulating the valuation as a closed-ended question about voting in a referendum to raise taxes for a particular purpose. He addresses various objections that contingent valuation results are incompatible with economic theory. Even without a market, there still exists a latent demand curve for nonmarket goods; contingent valuation represents a way to tease this out.