Testing the effectiveness of oath script in reducing hypothetical bias in Contingent Valuation Method
The objective of our study is to investigate the effect of the oath script (HO) in an hypothetical Contingent Valuation survey in a Mediterranean country (e.g. Italy). Hence, we conducted CE surveys with three treatments: (1) CE without a cognitive task, (2) CE with a CT script, and (3) CE with a HO. Our findings showed that the effectiveness of HO script depends on participants’ socio-demographic characteristics. For instance, we found that HO script could help to reduce the hypothetical bias for people who possess a high educational level in contrast with those people with low education and low income. Hence, our findings suggest that the oath script not only does not a guarantee the reduction of hypothetical bias but also does not explain the mixed results found in the previous studies.
Journal Title/Title of Proceedings
Agricultural Economics - Czech