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Does Choice Context Affect the Results from Incentive‐Compatible Experiments? The Case of Non‐GM and Country‐of‐Origin Premia in Canola Oil

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  • Dmitriy Volinskiy
  • Wiktor L. Adamowicz
  • Michele Veeman
  • Lorie Srivastava

Abstract

We seek to design and implement a WTP elicitation instrument closely resembling an actual grocery shopping experience. An incentive‐compatible choice experiment is used to elicit values for a non‐GM attribute and a country‐of‐origin attribute of Canola oil. The choice context is varied to assess whether revealed‐preference choice experiments are affected by choice variety. A median premium for non‐GM Canola oil is found to approximate C$0.45 or C$0.62/liter according to the choice variety context; different country‐of‐origin effects are also found as choice context varies. Hypotheses as to why these significant effects of choice contexts occur are suggested. Nous cherchons à concevoir et à mettre en application un instrument de révélation de la VDP qui ressemble étroitement aux choix que fait un consommateur lorsqu’il effectue son marché. Nous avons utilisé une méthode expérimentale compatible avec les incitations des participants afin de découvrir la valeur accordée à deux caractéristiques de l’huile de canola: non génétiquement modifiée et étiquetée selon le pays d’origine. La liste des choix est variée afin d’évaluer si les préférences révélées sont influencées par la gamme de choix. La prime médiane de l’huile de canola non génétiquement modifiée est d’environ 0,45 $CAN ou 0,62 $CAN le litre selon les choix proposés. Différents pays d’origine figurent aussi dans cette liste de choix. Nous avons formulé des hypothèses quant aux raisons pour lesquelles la gamme de choix a des effets importants.

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  • Dmitriy Volinskiy & Wiktor L. Adamowicz & Michele Veeman & Lorie Srivastava, 2009. "Does Choice Context Affect the Results from Incentive‐Compatible Experiments? The Case of Non‐GM and Country‐of‐Origin Premia in Canola Oil," Canadian Journal of Agricultural Economics/Revue canadienne d'agroeconomie, Canadian Agricultural Economics Society/Societe canadienne d'agroeconomie, vol. 57(2), pages 205-221, June.
    • Handle: RePEc:bla:canjag:v:57:y:2009:i:2:p:205-221
    DOI: 10.1111/j.1744-7976.2009.01148.x
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    2. Ballco, Petjon & Gracia, Azucena, 2020. "Do market prices correspond with consumer demands? Combining market valuation and consumer utility for extra virgin olive oil quality attributes in a traditional producing country," Journal of Retailing and Consumer Services, Elsevier, vol. 53(C).
    3. Jing Zhang & Wiktor L. Adamowicz, 2011. "Unraveling the Choice Format Effect: A Context-Dependent Random Utility Model," Land Economics, University of Wisconsin Press, vol. 87(4), pages 730-743.
    4. Weng, Weizhe & Morrison, Mark & Boyle, Kevin & Boxall, Peter, 2017. "The effect of the number of alternatives in a choice experiment with an application to the Macquarie Marshes, AU," 2017 Annual Meeting, February 4-7, 2017, Mobile, Alabama 252836, Southern Agricultural Economics Association.
    5. Mørkbak, Morten Raun & Olsen, Søren Bøye & Campbell, Danny, 2014. "Behavioral implications of providing real incentives in stated choice experiments," Journal of Economic Psychology, Elsevier, vol. 45(C), pages 102-116.
    6. Azucena Gracia, 2014. "Consumers’ preferences for a local food product: a real choice experiment," Empirical Economics, Springer, vol. 47(1), pages 111-128, August.
    7. Cash, Sean B. & McAlister, Anna R., 2017. "Young Food Consumers: How do Children Respond to Point-of-Purchase Interventions?," 2017 Allied Social Sciences Association (ASSA) Annual Meeting, January 6-8, 2017, Chicago, Illinois 252700, Agricultural and Applied Economics Association.
    8. Zheng, Qiujie & Nayga, Rodolfo M. Jr. & Yang, Wei & Tokunaga, Kanae, 2022. "Do U.S. consumers value genetically modified farmed salmon?," 2022 Annual Meeting, July 31-August 2, Anaheim, California 322154, Agricultural and Applied Economics Association.
    9. Bazzani, Claudia & Nayga, Rodolfo M. Jr. & Caputo, Vincenzina & Canavari, Maurizio & Danforth, Diana M., 2016. "On the Use of the BDM Mechanism in Non-Hypothetical Choice Experiments," 2016 Annual Meeting, July 31-August 2, Boston, Massachusetts 235904, Agricultural and Applied Economics Association.
    10. Fernandez-Cornejo, Jorge & Livingston, Michael J. & Mitchell, Lorraine & Wechsler, Seth, 2014. "Genetically Engineered Crops in the United States," Economic Research Report 164263, United States Department of Agriculture, Economic Research Service.
    11. Meyerhoff, Jürgen & Glenk, Klaus, 2015. "Learning how to choose—effects of instructional choice sets in discrete choice experiments," Resource and Energy Economics, Elsevier, vol. 41(C), pages 122-142.
    12. Weng, Weizhe & Morrison, Mark & Boyle, Kevin J. & Boxall, Peter C., 2017. "The effect of the number of alternatives in choice experiment questions," 2017 Annual Meeting, July 30-August 1, Chicago, Illinois 259179, Agricultural and Applied Economics Association.

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