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RELIABILITY OF STATED PREFERENCES FOR CHOLERA AND TYPHOID VACCINES WITH TIME TO THINK IN HUE, VIETNAM
Author(s) -
COOK JOSEPH,
WHITTINGTON DALE,
CANH DO GIA,
JOHNSON F. REED,
NYAMETE ANDREW
Publication year - 2007
Publication title -
economic inquiry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.823
H-Index - 72
eISSN - 1465-7295
pISSN - 0095-2583
DOI - 10.1111/j.1465-7295.2006.00038.x
Subject(s) - contingent valuation , cholera vaccine , typhoid fever , willingness to pay , valuation (finance) , economics , cholera , preference , actuarial science , microeconomics , medicine , finance , virology , biology , bacteria , vibrio cholerae , genetics , pathology
We examine the effect of giving respondents time to think about their stated choices (SC) in a survey of cholera and typhoid vaccine preferences in Hue, Vietnam. Because neither vaccine is widely available in Vietnam, we used the SC approach (a stated preference technique) and gave half of our respondents overnight to think about their choices to make the hypothetical valuation scenario as similar to a real‐life choice situation as possible. Respondents who were given extra time made fewer choices that violated internal validity tests of utility theory, and had lower average willingness to pay (WTP), confirming a result found in similar studies in the contingent valuation literature . ( JEL D12, I18, C25)