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• W2163047794 abstract "We examine whether the effects of information about product labels change over time. The analysis is based on 110 adult (nonstudent) participants who participated in a two-stage economic experiment taking place three months apart. In the first stage of the experiment, willingness-to-pay (WTP) was elicited for items that were stated to contain bovine growth hormones, genetically modified ingredients, ingredients that have been exposed to antibiotics, and ingredients that were irradiated. Depending on the treatment, each first-stage auction was supplemented with positive or negative information about each of the labels. The second-stage experiments re-elicited WTP for the same group of participants and the same items accompanied with the original labels, but this time without any secondary information. Our results suggest that the adverse impact of negative information does not persist over time; whereas in the case of positive information, changes in WTP from the initial to the follow-up auctions are not statistically significant. This study enhances our understanding of how consumers retain information over a longer time period and suggests that previous studies that measure labeling impacts on WTP using isolated, single-shot experiments may overstate the longer term effects of labels and negative information.La presente etude vise a determiner si les effets de l'information concernant les etiquettes d'un produit changent ou non au fil du temps. Cent-dix sujets adultes (non etudiants) ont participe a une experience realisee en deux etapes espacees de trois mois. Lors de la premiere etape, nous avons recueilli le consentement a payer (CAP) des participants pour des produits dont on disait contenir des hormones de croissance bovines, des ingredients genetiquement modifies, ayant ete exposes a des antibiotiques et ayant ete irradies. Au cours de cette premiere etape, les participants ont recu de l'information supplementaire, positive ou negative, a propos de chaque etiquette. Lors de la deuxieme etape, nous avons recueilli de nouveau le CAP des participants pour les memes produits sur lesquels figuraient les etiquettes originales, sans toutefois fournir d'information supplementaire. Les resultats de notre etude montrent que l'effet defavorable de l'ajout d'information negative ne persiste pas avec le temps; dans le cas de l'ajout d'information positive, les changements quant au CAP entre les premieres encheres et les encheres suivantes ne sont pas statistiquement significatifs. Cette etude nous a permis de mieux comprendre de quelle facon les consommateurs retiennent l'information a long terme et autorise a penser que les etudes anterieures qui ont mesure les repercussions de l’etiquetage sur le CAP en realisant des experiences uniques et isolees ont peut-etre surestime les effets a long terme de l’etiquetage et de l'information negative." @default.
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• W2163047794 date "2015-11-05" @default.
• W2163047794 modified "2023-09-28" @default.
• W2163047794 title "The Long-Term Impact of Positive and Negative Information on Food Demand" @default.
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• W2163047794 doi "https://doi.org/10.1111/cjag.12074" @default.
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