Differences between Continuous and Discrete Contingent Value Estimates

Ready, Richard C.; Buzby, Jean C.; Hu, Dayuan

doi:10.2307/3147205

Cited by 170 publications

(108 citation statements)

References 19 publications

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“…While we could have used a single binary question where we varied the bid amounts, as is often done [7,19], we wanted more precise answers given that the study follows people over time. Consistent with past findings [20], a single binary response would have reduced our ability to detect small but meaningful within-person changes over time. Alternatively, we could have used an open-ended response, but this method is not recommended [14,21,22].…”

Section: Discussionsupporting

confidence: 80%

Willingness to pay for mammography: item development and testing among five ethnic groups

Wagner

Hu²,

Dueñas

et al. 2000

Health Policy

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The goal of this study was to develop a willingness to pay (WTP) question for mammography that is appropriate for low income, ethnically-diverse women. Through qualitative research with 50 low income women of five ethnic groups we developed both a WTP question and a willingness to travel question (WTT). After being refined through interviews with 41 women, these questions were pilot tested on a random sample of 52 low income, ethnically-diverse women in the San Francisco area. Results show that the concepts underlying WTP and WTT were culturally appropriate to the five ethnicities in this study. Analyses generally confirm the validity of the WTP and WTT questions. As expected, WTP was associated with household income, perceived risk of cancer, and knowledge that one needs a mammogram even after a clinical breast examination. Despite the small samples, WTP varied among the ethnic groups. Additionally, WTT was moderately correlated with the natural log of WTP (r = 0.58, P < 0.001). These questions are now in use in a larger clinical trial and future analyses will explore willingness to pay and willingness to travel within and across the ethnic groups.

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Section: Discussionsupporting

confidence: 80%

Willingness to pay for mammography: item development and testing among five ethnic groups

Wagner

Hu²,

Dueñas

et al. 2000

Health Policy

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“…The CVM is a recognized and widely used non-market valuation technique (Cameron and Huppert, 1989;Ready et al, 1996). In developing countries, CV surveys were originally applied in water supply and other environmental benefits estimation, and are much easier and very straight forward to conduct because the respondents take it more serious than in the industrialized countries (Whittington, 1998).The CVM is better as compared to the HPM method because it is suitable in eliciting both use and non-use values (Kramer and Eisen-Hecht, 2002;World Bank, 2002), and when there is no observable data that are available for the policy option to be analyzed (World Bank, 2002).…”

Section: The Contingent Valuation Methods (Cvm)mentioning

confidence: 99%

“…It is used widely in developing countries (FAO, 2000) but Whittington (1998) revealed that the variation of bids across individuals pose problems in tightly-knit communities such as those in developing countries. The dichotomous choice, according to Ready et al (1996), has problems including starting point bias, uncertainty, inconsistence and strong assumptions.…”

Section: The Contingent Valuation Methods (Cvm)mentioning

confidence: 99%

Estimating Farmers’ Willingness to Pay for Improved Irrigation: An Economic Study of the Bontanga Irrigation Scheme in Northern Ghana

Alhassan

2013

JAS

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Method (CVM) was used in this study and farmers were randomly selected for interviewing based on the location of their farms (upstream, middle, and downstream) within the scheme. The payment card elicitation format was used and the data were analyzed using Maximum Likelihood Estimation (MLE) procedure that is capable of accommodating the intervals in payment card data. The mean willingness to pay was found to be GHC 16.32 (US$ 8.50) per ha per year and the median was GHC 14.00 (US$ 7.29) per ha per year.Tobit regression model was also used to estimate the mean number of labor days farmers under the scheme would be willing to contribute to improve the project. The mean labor days was found to be 5.26 days per year and the median was 5.28 days per year.iii ACKNOWLEDGEMENTS Without the guidance of my advisor, co-advisor, committee members, help from friends, and support from my family and wife, this thesis would not have reached the completion stage.

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“…In this study, we adopt an open-ended CV format to elicit each respondent's WTCL for mangrove restoration. Respondents who were not interested to contribute labor for mangrove restoration or did not accept the hypothetical scenario defined in the survey were dealing with as having zero values [28]. Strazzera et al [29] stated true zero values could be covered in CV analysis using Tobit model.…”

Section: Data Collection and Survey Structurementioning

confidence: 99%

The Opportunity Cost of Labor for Valuing Mangrove Restoration in Mahakam Delta, Indonesia

2017

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Abstract:Worldwide, damage to mangroves is alarming. Restoration is required to recover mangrove ecosystems, and communities' involvement is a primary factor to reduce the threat to mangroves. Their participation might be interpreted as the appropriate decision concerning conservation and utilization of mangroves. Using a contingent valuation approach, this study assesses mangroves' values to local communities through their willingness to contribute labor to obtain monetary value. Results showed that the opportunity cost of time was valued at IDR 398.76 thousand (US$29.99) a month or IDR 4.79 million (US$359.90) per year. A total annual benefit of mangrove restoration using the wage rate of time (WRT) is IDR 143 billion (US$10.77 million) per year. Accessing such information is crucial to making the appropriate decisions about conservation of mangroves within the context of developing countries that have poor coastal communities and low incomes. Tobit regression determined that five variables affect willingness to provide labor time and WRT significantly for mangrove restoration. These findings can support decision-makers with the relevant information for assessing a mangrove restoration project.

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Differences between Continuous and Discrete Contingent Value Estimates

Cited by 170 publications

References 19 publications

Willingness to pay for mammography: item development and testing among five ethnic groups

Willingness to pay for mammography: item development and testing among five ethnic groups

Estimating Farmers’ Willingness to Pay for Improved Irrigation: An Economic Study of the Bontanga Irrigation Scheme in Northern Ghana

The Opportunity Cost of Labor for Valuing Mangrove Restoration in Mahakam Delta, Indonesia

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