How Precise Are Monetary Representations of Environmental Improvements?
研究发现，人们用货币表示对环境物品的支付意愿时，高度依赖于假定的预算单位大小，表明其价值在货币上只有模糊的表示，任何宽泛范围内的金额都被视为可接受的价值表达。
ABSTRACT. Subjects valued environmental goods using a response mode expressing willingness to pay as a multiplier or divider of a purported "budgetary unit. " Hypothetical willingness to pay was found to be highly dependent on the size of the budgetary unit. Rejecting two other interpretations, we belieue the results suggest that people's contin-gent values are only vaguely represented in mone-tary terms; any dollar amount within a broad range is considered an acceptable expression of value. Although the procedures differ from those of a typical contingent valuation suruey, the results demonstrate some of the difficulties in discovering precise monetary values for environmental re-sources. I.