An addendum to: a meta-analysis of hypothethical bias in stated preference valuation

Gianluca Stefani, Riccardo Scarpa and Ginevra V. Lombardi

Bio-based and Applied Economics Journal, 2014, vol. 03, issue 2, 10

Abstract: A recent study published by Murphy et al. (2005) reported results of a meta-analysis of hypothetical bias using 28 valuation studies. The authors found a median ratio of hypothetical to actual values of 1.35 but they did not investigate the ratio of variances of the hypothetical and actual value distributions, which is of great relevance in joint stated and revealed preference analysis. We propose an addendum to Murphy et al. (2005) to provide some insights on the distribution of the scale factor across 23 studies for which relevant data is available. We distinguish three types of dispersion parameters reported in the literature. We find that the ratio of real to hypothetical standard deviations of marginal distributions of WTP is about 0.6.

Keywords: Research; Methods/Statistical; Methods (search for similar items in EconPapers)
Date: 2014
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (4)

Downloads: (external link)
https://ageconsearch.umn.edu/record/182909/files/14704-28971-2-PB.pdf (application/pdf)

Related works:
Working Paper: An addendum to: A Meta-Analysis of Hypothethical Bias in Stated Preference Valuation (2014)
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:ags:aieabj:182909

DOI: 10.22004/ag.econ.182909

Access Statistics for this article

More articles in Bio-based and Applied Economics Journal from Italian Association of Agricultural and Applied Economics (AIEAA) Contact information at EDIRC.
Bibliographic data for series maintained by AgEcon Search ().