Do CVM welfare estimates suffer from on-site sampling bias? A comparison of on-site and household visitor surveys

Journal Article (Journal Article)

The problem of endogenous stratification associated with on-site sampling has been overlooked in the Contingent Valuation Method (CVM). We find that using on-site samples of visitors overstates visitor willingness to pay (WTP) estimates relative to a household sample of visitors, and substantially overstates the unconditional population values. We provide two methods of correcting WTP of on-site samples. The uncorrected on-site sample CVM yields WTP of $132 per trip, while visitor WTP obtained from a random sample of households had a value of $66 per trip. Adaptation of choice-based sampling correction estimator to the on-site CVM data yields $73 per trip, not statistically different from the visitor value from the household survey, but significantly different from the uncorrected on-site sample value. Copyright 2010 Northeastern Agricultural and Resource Economics Association.

Full Text

Duke Authors

Cited Authors

  • González-Sepúlveda, JM; Loomis, JB

Published Date

  • January 1, 2010

Published In

Volume / Issue

  • 39 / 3

Start / End Page

  • 561 - 570

International Standard Serial Number (ISSN)

  • 1068-2805

Digital Object Identifier (DOI)

  • 10.1017/S1068280500007516

Citation Source

  • Scopus