This paper proposes a flexible modelling approach for either stated or revealed preference nonmarket valuation studies based on Generalized Additive Models (GAMs). GAMs encompass non-linear relationships via smooth functions, thereby avoiding imposing restrictive parametric specifications, which...

The objective of this study was to test for the effect of consequentiality on the probability of a respondent opting out of voting in a stated preference survey. We find that respondents who believe the survey is inconsequential are more likely to opt out than to vote ‘yes’ in both...

Individuals are widely believed to overstate their economic valuation of a good by a factor of two or three. This paper reports the results of a meta-analysis of hypothetical bias in 28 stated preference valuation studies that report monetary willingness-to-pay and that used the same mechanism...

Stated preference (SP) surveys have been conducted to value non-timber benefits (NTBs) from forests in Norway, Sweden and Finland for about 20 years. The paper first reviews the literature and summarises methodological traditions in SP research in the three countries. Second, a meta-regression...

This work aims at analysing the value of recreational water uses for the Idro Lake (Lombardy, Northern Italy), which has been experiencing dramatic fluctuations in its levels in recent years, due to excessive productive withdrawal that affected recreational uses. It estimates the economic...

We design a choice experiment comparing policies that reduce agricultural nutrient pollution and harmful algal blooms in Lake Erie and administer it to Ohio residents using an online survey panel. We compare two treatments that have been found to mitigate hypothetical bias, cheap talk and...

We estimate demand models with revealed preference (RP) site selection and stated preference (SP) discrete choice experiment marine recreational fishing data. We combine RP data from the Marine Recreational Information Program (MRIP) creel survey with SP survey data from 2003/04. RP and SP data...

Applications using the standard willingness to pay (WTP) approach (where a respondent is asked his/her WTP for each option) have brought to light inherent difficulties in terms of discriminating between various options. Although an incremental WTP approach (where a less preferred option is used...

We propose a method to quantify other-regarding preferences in group decisions. Our method is based on revealed preference theory. It measures willingness-to- pay for others’ consumption and willingness-to-pay for equality in consumption by evaluating consumption externalities in monetary...