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Assessing Conjoint Analysis Internal Validity: the Effect of Various Continuous Attribute Level Spacings

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  • Dominique Rouzies

    (GREGH - Groupement de Recherche et d'Etudes en Gestion à HEC - HEC Paris - Ecole des Hautes Etudes Commerciales - CNRS - Centre National de la Recherche Scientifique)

  • Renée Darmon

Abstract

Marketing research studies using conjoint analysis typically involve many attributes (some continuous, other discrete), at two or more levels. In the case of continuous attributes at three or more levels, the most frequent research practice has been to select equally spaced levels which encompass the relevant attribute range. This paper investigates the impact of selecting equally vs. unequally spaced attribute levels upon the quality of the recovery of a respondent's utility functions, depending upon (1) some basic underlying utility function characteristics (such as the function's range, shape, and curvature), and (2) current conjoint analysis estimation procedures. The study's methodology involves an artificial data base in which the utility functions of 64 simulated subjects for three levels of three different attributes, have been systematically varied in terms of their shapes, ranges, and curvatures. The results shows substantial differences in the various aspects of the utility functions' recovery. The implications on the internal validity of the conjoint analysis methodology as well as for the researchers using the technique and the various estimation procedures are discussed.

Suggested Citation

  • Dominique Rouzies & Renée Darmon, 1989. "Assessing Conjoint Analysis Internal Validity: the Effect of Various Continuous Attribute Level Spacings," Post-Print hal-00537869, HAL.
    • Handle: RePEc:hal:journl:hal-00537869
    DOI: 10.1016/0167-8116(89)90045-1
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    Cited by:

    1. Andreas Falke & Harald Hruschka, 2017. "Setting prices in mixed logit model designs," Marketing Letters, Springer, vol. 28(1), pages 139-154, March.
    2. Teichert, Thorsten Andreas, 1997. "A model of ranked conjoint-data and implications for evaluation," Manuskripte aus den Instituten für Betriebswirtschaftslehre der Universität Kiel 461, Christian-Albrechts-Universität zu Kiel, Institut für Betriebswirtschaftslehre.

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    Keywords

    Marketing research studies using conjoint analysis typically involve many attributes (some continuous; other discrete); at two or more levels. In the case of continuous attributes at three or more levels; the most frequent research practice has been to select equally spaced levels which encompass the relevant attribute range. This paper investigates the impact of selecting equally vs. unequally spaced attribute levels upon the quality of the recovery of a respondent's utility functions; depending upon (1) some basic underlying utility function characteristics (such as the function's range; shape; and curvature); and (2) current conjoint analysis estimation procedures. The study's methodology involves an artificial data base in which the utility functions of 64 simulated subjects for three levels of three different attributes; have been systematically varied in terms of their shapes; ranges; and curvatures. The results shows substantial differences in the various aspects of the utility functions' recovery. The implications on the internal validity of the conjoint analysis methodology as well as for the researchers using the technique and the various estimation procedures are discussed.; and curvatures. The results shows substantial differences in the various aspects of the utility functions' recovery. The implications on the internal validity of the conjoint analysis methodology as well as for the researchers using the technique and the various estimation procedures are discussed;
    All these keywords.

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