Household demand for typhoid fever vaccines in Hue, Vietnam

Canh, Do Gia; Whittington, Dale; Thoa, Lê Thị Kim; Utomo, N.A.; Hoa, Nguyen Thai; Poulos, Christine; Thuy, Dang Thi Dieu; Kim, Dohyeong; Nyamete, Andrew; Acosta, Camilo J.

doi:10.1093/heapol/czl009

Cited by 36 publications

(30 citation statements)

References 15 publications

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“…Unfortunately, there are considerable empirical uncertainties surrounding the reliability and accuracy of CV survey results in developing countries (Whittington, 2002). Furthermore, there are reasons to believe that preference anomalies are likely to be at least as important in developing countries as in developed countries, due to the lack of familiarity with both real and hypothetical 23 Specific examples include the valuation of water quality and sanitation improvements (Whittington al., 1988, 1990, Altaf et al, 1993Singh et al, 1993), biodiversity and recreation (Sattout et al, 2007;Navrud andMungatana, 1994 andMoran, 1994), health (Cahn et al, 2006;Cropper et al 2004 andWhittington et al, 2003) and forestry (;Shyansundar et al 1995;Mekonnen, 2000 andKöhlin, 2000).…”

Section: Resultsmentioning

confidence: 99%

Contingent valuation of community forestry programs in Ethiopia: Controlling for preference anomalies in double-bounded CVM

Gelo

Koch

2015

Ecological Economics

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This study examines the welfare effects of community plantations in Ethiopia via Contingent Valuation. Both single-bounded and double-bounded survey methods were considered, and, with respect to double-bounded methods, the potential for anomalous response behaviour was also taken into account. The results generally confirm that there are statistically significant welfare benefits to be derived from community forestry; however, the range of the estimated benefits is large. After controlling for anomalous response behaviour, the range of estimated benefits narrows, and our preferred estimates place the welfare gain between Ethiopian Birr (ETB) 20.14 and 30.41 per household, which is much lower than the estimated benefits without controlling for anomalous preference responses.

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Section: Resultsmentioning

confidence: 99%

Contingent valuation of community forestry programs in Ethiopia: Controlling for preference anomalies in double-bounded CVM

Gelo

Koch

2015

Ecological Economics

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“…Although some respondents had experience with older, less effective versions of these vaccines, the improved "next generation" cholera or typhoid vaccines were generally unavailable in these countries except in limited trials designed to evaluate the vaccines' protective effectiveness, during which they were distributed free of charge (Jeuland et al 2009c). Because of this unavailability of "next generation" vaccines, we relied on stated preference techniques to measure household demand (Canh et al 2006, Lucas et al 2007, Islam et al 2008, Kim et al 2008. This information was then used to evaluate the economic attractiveness of investments in these vaccines using both benefit-cost and cost-effectiveness techniques , Cook et al 2009b, Jeuland et al 2009b.…”

Section: Study Sites and Research Designmentioning

confidence: 99%

Giving Stated Preference Respondents “Time to Think”: Results From Four Countries

Cook

Jeuland

Maskery

et al. 2011

Environ Resource Econ

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Previous studies have found that contingent valuation (CV) respondents who are given overnight to reflect on a CV scenario have 30 -40% lower average willingness-to-pay (WTP) than respondents who are interviewed in a single session. This "time to think" (TTT) effect could explain much of the gap between real and hypothetical WTP observed in experimental studies. Yet giving time to think is still rare in binary or multinomial discrete choice studies. We review the literature on increasing survey respondents' opportunities to reflect on their answers and synthesize results from parallel TTT studies on private vaccine demand in four countries. Across all four countries, we find robust and consistent evidence from both raw data and multivariate models for a TTT effect: giving respondents overnight to think reduced the probability that a respondent said he or she would buy the hypothetical vaccines. Average WTP fell approximately 40%. Respondents with time to think were also more certain of their answers, and a majority said they used the opportunity to consult with their spouse or family. We conclude with a discussion of why researchers might be hesitant to adopt the TTT methodology.

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“…Stated preference (SP) methods such as contingent valuation, on the other hand, have been applied to a wide variety of health-related valuation problems, including vaccine demand (Whittington et al, 2002;Cropper et al, 2004;Canh et al, 2006;Cook et al, 2007;Kim et al, 2007;Whittington et al, 2009), largely because of their flexibility. Meta-analyses of results from SP and RP studies fail to show systematic and large discrepancies (Brookshire, 1982;Carson, 1996).…”

Section: Background-nonmarket Valuation Techniquesmentioning

confidence: 99%

Estimating the private benefits of vaccination against cholera in Beira, Mozambique: A travel cost approach

Jeuland

Lucas²,

Clemens

et al. 2010

Journal of Development Economics

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a b s t r a c t JEL classification: H4 I1 Keywords: Travel cost Willingness to pay Vaccine demand Cholera MozambiqueThis paper reports the results of the first study that estimates households' private demand for cholera vaccines using the travel cost method. We take advantage of an unusual natural experiment. In January 2004, more than 41,000 residents from various locations in Beira, Mozambique received two doses of oral cholera vaccine free of charge during the first vaccination trial to test its effectiveness in an endemic cholera zone of Africa. About 30,000 people participated from outside the target zone, resulting in long queues and an average waiting time of about 85 min per dose. We estimated travel cost models of the revealed demand for cholera vaccines among households informed of the trial using information collected in in-person interviews conducted during the summer of 2005. To explore households' participation in the trial, we used standard and zero-inflated household count models for all household members and dichotomous choice models for the head of the household. Our analysis shows that the quantity of vaccines obtained by households and the likelihood of participation decreased as travel cost-in time and transport expenses-rose. Our best estimates of per capita willingness to pay for the two required doses of cholera vaccine are about 0.85 USD. These estimates are sensitive to the assumed value of time spent acquiring vaccines.

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Household demand for typhoid fever vaccines in Hue, Vietnam

Cited by 36 publications

References 15 publications

Contingent valuation of community forestry programs in Ethiopia: Controlling for preference anomalies in double-bounded CVM

Contingent valuation of community forestry programs in Ethiopia: Controlling for preference anomalies in double-bounded CVM

Giving Stated Preference Respondents “Time to Think”: Results From Four Countries

Estimating the private benefits of vaccination against cholera in Beira, Mozambique: A travel cost approach

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