Journal
AMERICAN JOURNAL OF AGRICULTURAL ECONOMICS
Volume 91, Issue 2, Pages 518-534Publisher
WILEY-BLACKWELL PUBLISHING, INC
DOI: 10.1111/j.1467-8276.2008.01242.x
Keywords
contingent valuation; choice experiments; experimental economics; external validity; field experiment
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We compare the ability of three preference elicitation methods (hypothetical choices, nonhypothetical choices, and nonhypothetical rankings) and three discrete-choice econometric models (the multinomial logit [MNL], the independent availability logit [IAL], and the random parameter logit [RPL]) to predict actual retail shopping behavior in three different product categories (ground beef, wheat flour, and dishwashing liquid). Overall, we find a high level of external validity. Our specific results suggest that the nonhypothetical elicitation approaches, especially the nonhypothetical ranking method, outperformed the hypothetical choice experiment in predicting retail sales. We also find that the RPL can have superior predictive performance, but that the MNL predicts equally well in some circumstances.
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