This paper hypothesizes that respondents in contingent valuation surveys may form different benefit and cost levels that deviate from the levels specified by the researcher. The conceptual framework investigates potential biases based on the direction of deviations. Survey data on the restoration of wetlands in Tampa Bay show that a significant portion of the respondents deviate from the benefit and cost levels presented in the scenario. Empirical results indicate that willingness-to-pay (WTP) estimates are very sensitive to the perceived benefit and cost levels. Depending on the direction of the deviations, WTP estimates could fluctuate up to +61 percent and −82 percent, compared to the estimate from those who evaluate the scenario at the presented levels.

Based on a contingent valuation method survey on air quality improvement in northern China, we construct several subjective perception determinants of respondents' valuation uncertainty from both the demand and perceived supply sides. Using the individual-level uncertainty measurements initially proposed by Wang and He (2011) and their alternative transformations, we analyze how these factors of demand and perceived supply sides affect people's valuation uncertainty. Our results demonstrate the significant contribution of these determinants in explaining respondents' uncertainty. On the demand side, people who ‘don't know much’ about benefits-related factors have the highest level of uncertainty, and those claiming to ‘know nothing’ most often report the lowest level of uncertainty. On the supply side, people who either do not trust or are not satisfied with the control policies tend to be more certain of their valuation. The subsequent analyses also suggest that these results be interpreted as negative certainty, which is attributed to a lack of interest.

This research examines the relationship between positive and negative perceptions of pensions and motivation to engage in the decision process of choosing a private pension plan, as well as satisfaction from the chosen pension plan, among trained economists. A sample of 134 economists completed a self-report survey examining the decision process of different decision contexts in life, including pension decisions. Overall, participants showed low motivation to engage in the process of choosing a private pension plan, compared to their motivation to engage in other decision tasks. However, economists invested more in the decision process and showed greater satisfaction from their decision regarding their pension plan when they had a more positive perception of pensions. This perception is represented by higher subjective likelihood of receiving pension allowances for a long period, and by a profitable view of the balance between current payments and expected incomes from pension saving.