Analysis of Cardinal and Ordinal Assumptions in Conjoint Analysis
AbstractOf twenty-three agricultural economics conjoint analyses conducted between 1990 and 2001, seventeen used interval-rating scales, with estimation procedures varying widely. This study tests cardinality assumptions in conjoint analysis when interval-rating scales are used, and tests whether the ordered probit or two-limit tobit model is the most valid. Results indicate that cardinality assumptions are invalid, but estimates of the underlying utility scale for the two models do not differ. Thus, while the ordered probit model is theoretically more appealing, the two-limit tobit model may be more useful in practice, especially in cases with limited degrees of freedom, such as with individual-level conjoint models.
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Bibliographic InfoArticle provided by Northeastern Agricultural and Resource Economics Association in its journal Agricultural and Resource Economics Review.
Volume (Year): 34 (2005)
Issue (Month): 2 (October)
ordered probit; two-limit probit; conjoint analysis; cardinality; Research Methods/ Statistical Methods;
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