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

机译:选举调查中与电话相比,使用有激励和无激励的网络的样本表示和实质性结果

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摘要

The objective of this article is to understand how the change of mode from telephone to webaffects data quality in terms of sample representation and substantive variable bias. To thisend, an experiment, consisting of a web survey with and without a prepaid incentive, wasconducted alongside the telephone Swiss election survey. All three designs used identicalquestionnaires and probability samples drawn from a national register of individuals.First, our findings show that differences in completion rates mostly reflect different levelsof coverage in the two modes. Second, incentives in the web survey strongly increasecompletion rates of all person groups, with the exception of people without Internet access orlimited computer literacy. Third, we find voting behavior to be much closer to official figuresin the web with the incentive version compared to the two other designs. However, this ispartly due to the different sociodemographic compositions of the samples. Other substantiveresults suggest that the incentive version includes harder-to-reach respondents. Unit costs aremuch lower in the two web designs compared to the telephone, including when a relativelyhigh incentive is used. We conclude that in countries with high Internet penetration rates suchas Switzerland, web surveys are already likely to be highly competitive.
机译:本文的目的是了解从电话模式到网络模式的变化如何通过样本表示和实质性变量偏差来影响数据质量。为此,在电话瑞士大选调查的同时,进行了一项包括有或没有预付费激励措施的网络调查的实验。这三种设计均使用相同的问卷和从国家个人登记册中抽取的概率样本。首先,我们的发现表明,完成率的差异主要反映了两种模式下覆盖率的不同。其次,网络调查中的激励措施极大地提高了所有人群的完成率,但没有互联网访问权限或计算机知识水平有限的人群除外。第三,与其他两种设计相比,使用激励版本的投票行为更接近网络上的官方人物。但是,这部分是由于样品的社会人口统计学组成不同所致。其他实质性结果表明,奖励版本包括难以覆盖的受访者。与电话相比,这两种Web设计的单位成本要低得多,包括使用相对较高的激励时。我们得出结论,在瑞士等互联网普及率高的国家,网络调查可能已经具有很高的竞争力。

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  • 作者

    Lipps, O.; Pekari, N.;

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  • 年度 2016
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  • 原文格式 PDF
  • 正文语种 eng
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