Sample Representation and Substantive Outcomes Using Web With and Without Incentives Compared to Telephone in an Election Survey

Détails

Ressource 1Télécharger: BIB_15498BB131FB.P001.pdf (269.70 [Ko])
Etat: Serval
Version: Final published version
ID Serval
serval:BIB_15498BB131FB
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
Sample Representation and Substantive Outcomes Using Web With and Without Incentives Compared to Telephone in an Election Survey
Périodique
Journal of Official Statistics
Auteur(s)
Lipps O., Pekari N.
Statut éditorial
Publié
Date de publication
03/2016
Peer-reviewed
Oui
Volume
32
Numéro
1
Pages
165-186
Langue
anglais
Résumé
The objective of this article is to understand how the change of mode from telephone to web
affects data quality in terms of sample representation and substantive variable bias. To this
end, an experiment, consisting of a web survey with and without a prepaid incentive, was
conducted alongside the telephone Swiss election survey. All three designs used identical
questionnaires and probability samples drawn from a national register of individuals.
First, our findings show that differences in completion rates mostly reflect different levels
of coverage in the two modes. Second, incentives in the web survey strongly increase
completion rates of all person groups, with the exception of people without Internet access or
limited computer literacy. Third, we find voting behavior to be much closer to official figures
in the web with the incentive version compared to the two other designs. However, this is
partly due to the different sociodemographic compositions of the samples. Other substantive
results suggest that the incentive version includes harder-to-reach respondents. Unit costs are
much lower in the two web designs compared to the telephone, including when a relatively
high incentive is used. We conclude that in countries with high Internet penetration rates such
as Switzerland, web surveys are already likely to be highly competitive.
Mots-clé
Web surveys, mode experiment, incentive effects, individual register frame, national election survey
Site de l'éditeur
Open Access
Oui
Création de la notice
17/03/2016 9:55
Dernière modification de la notice
08/05/2019 14:53
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